/usr/bin/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-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:31:37,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:31:37,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:31:37,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:31:37,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:31:37,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:31:37,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:31:37,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:31:37,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:31:37,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:31:37,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:31:37,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:31:37,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:31:37,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:31:37,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:31:37,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:31:37,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:31:37,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:31:37,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:31:37,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:31:37,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:31:37,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:31:37,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:31:37,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:31:37,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:31:37,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:31:37,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:31:37,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:31:37,203 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 [2020-07-07 11:31:37,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:31:37,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:31:37,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:31:37,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:31:37,228 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:31:37,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:31:37,228 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:31:37,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:31:37,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:31:37,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:31:37,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:31:37,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:31:37,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:31:37,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:31:37,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:31:37,231 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:31:37,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:31:37,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:31:37,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:31:37,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:31:37,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:31:37,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:31:37,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:31:37,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:31:37,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:31:37,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:31:37,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:31:37,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:31:37,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:31:37,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:31:37,518 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:31:37,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:31:37,535 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:31:37,536 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:31:37,536 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:31:37,537 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-07-07 11:31:37,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce488837/9a4ebc26470d457ca80bc9235d74ad9d/FLAG429ebd449 [2020-07-07 11:31:38,059 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:31:38,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-07-07 11:31:38,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce488837/9a4ebc26470d457ca80bc9235d74ad9d/FLAG429ebd449 [2020-07-07 11:31:38,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce488837/9a4ebc26470d457ca80bc9235d74ad9d [2020-07-07 11:31:38,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:31:38,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:31:38,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:38,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:31:38,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:31:38,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:38" (1/1) ... [2020-07-07 11:31:38,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cba4cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38, skipping insertion in model container [2020-07-07 11:31:38,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:38" (1/1) ... [2020-07-07 11:31:38,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:31:38,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:31:38,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:38,616 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:31:38,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:38,665 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:31:38,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38 WrapperNode [2020-07-07 11:31:38,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:38,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:31:38,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:31:38,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:31:38,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38" (1/1) ... [2020-07-07 11:31:38,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38" (1/1) ... [2020-07-07 11:31:38,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38" (1/1) ... [2020-07-07 11:31:38,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38" (1/1) ... [2020-07-07 11:31:38,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38" (1/1) ... [2020-07-07 11:31:38,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38" (1/1) ... [2020-07-07 11:31:38,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38" (1/1) ... [2020-07-07 11:31:38,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:31:38,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:31:38,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:31:38,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:31:38,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38" (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 [2020-07-07 11:31:38,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:31:38,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:31:38,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:31:38,883 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-07-07 11:31:38,883 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-07-07 11:31:38,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:31:38,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:31:38,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:31:38,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:31:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-07-07 11:31:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:31:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-07-07 11:31:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:31:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:31:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:31:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:31:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:31:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:31:39,303 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:31:39,304 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-07-07 11:31:39,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:39 BoogieIcfgContainer [2020-07-07 11:31:39,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:31:39,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:31:39,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:31:39,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:31:39,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:31:38" (1/3) ... [2020-07-07 11:31:39,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6230ec0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:39, skipping insertion in model container [2020-07-07 11:31:39,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:38" (2/3) ... [2020-07-07 11:31:39,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6230ec0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:39, skipping insertion in model container [2020-07-07 11:31:39,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:39" (3/3) ... [2020-07-07 11:31:39,320 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-07-07 11:31:39,331 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:31:39,339 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:31:39,354 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:31:39,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:31:39,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:31:39,379 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:31:39,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:31:39,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:31:39,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:31:39,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:31:39,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:31:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-07 11:31:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 11:31:39,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:39,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:39,407 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:39,413 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-07-07 11:31:39,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:39,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986705090] [2020-07-07 11:31:39,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:39,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986705090] [2020-07-07 11:31:39,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:39,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:31:39,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912741678] [2020-07-07 11:31:39,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:31:39,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:39,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:31:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:31:39,644 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-07-07 11:31:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:39,934 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-07-07 11:31:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:31:39,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-07 11:31:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:39,947 INFO L225 Difference]: With dead ends: 150 [2020-07-07 11:31:39,947 INFO L226 Difference]: Without dead ends: 89 [2020-07-07 11:31:39,951 INFO L675 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 [2020-07-07 11:31:39,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-07 11:31:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-07-07 11:31:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:31:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-07-07 11:31:40,003 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-07-07 11:31:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:40,004 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-07-07 11:31:40,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:31:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-07-07 11:31:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 11:31:40,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:40,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:40,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:31:40,008 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:40,008 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-07-07 11:31:40,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:40,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806805205] [2020-07-07 11:31:40,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:40,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806805205] [2020-07-07 11:31:40,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702133106] [2020-07-07 11:31:40,126 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 [2020-07-07 11:31:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:40,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:31:40,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:40,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:40,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-07 11:31:40,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138798476] [2020-07-07 11:31:40,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:31:40,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:40,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:31:40,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:31:40,226 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 6 states. [2020-07-07 11:31:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:40,541 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-07-07 11:31:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:31:40,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-07 11:31:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:40,544 INFO L225 Difference]: With dead ends: 170 [2020-07-07 11:31:40,544 INFO L226 Difference]: Without dead ends: 122 [2020-07-07 11:31:40,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:31:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-07 11:31:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-07-07 11:31:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-07 11:31:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-07-07 11:31:40,575 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-07-07 11:31:40,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:40,576 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-07-07 11:31:40,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:31:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-07-07 11:31:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-07 11:31:40,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:40,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:40,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:31:40,790 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:40,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-07-07 11:31:40,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:40,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794817922] [2020-07-07 11:31:40,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:40,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794817922] [2020-07-07 11:31:40,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511283562] [2020-07-07 11:31:40,891 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 [2020-07-07 11:31:40,939 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:31:40,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:40,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:31:40,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:31:40,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:40,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-07-07 11:31:40,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738733021] [2020-07-07 11:31:40,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:31:40,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:40,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:31:40,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:31:40,971 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 4 states. [2020-07-07 11:31:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:41,012 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2020-07-07 11:31:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:31:41,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-07 11:31:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:41,014 INFO L225 Difference]: With dead ends: 112 [2020-07-07 11:31:41,014 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:31:41,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:31:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:31:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-07 11:31:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-07 11:31:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-07-07 11:31:41,024 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 18 [2020-07-07 11:31:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:41,025 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-07-07 11:31:41,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:31:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-07-07 11:31:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:31:41,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:41,027 INFO L422 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] [2020-07-07 11:31:41,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:41,242 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1841898364, now seen corresponding path program 1 times [2020-07-07 11:31:41,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:41,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431847006] [2020-07-07 11:31:41,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:41,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431847006] [2020-07-07 11:31:41,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572343766] [2020-07-07 11:31:41,345 INFO L94 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 -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 [2020-07-07 11:31:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-07 11:31:41,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:31:41,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:41,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-07-07 11:31:41,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323901773] [2020-07-07 11:31:41,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:31:41,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:31:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:31:41,424 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 3 states. [2020-07-07 11:31:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:41,452 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-07-07 11:31:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:31:41,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-07 11:31:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:41,454 INFO L225 Difference]: With dead ends: 125 [2020-07-07 11:31:41,454 INFO L226 Difference]: Without dead ends: 80 [2020-07-07 11:31:41,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:31:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-07 11:31:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-07-07 11:31:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-07 11:31:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-07-07 11:31:41,465 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 37 [2020-07-07 11:31:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:41,465 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-07-07 11:31:41,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:31:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-07-07 11:31:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 11:31:41,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:41,467 INFO L422 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] [2020-07-07 11:31:41,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:41,683 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash 581153498, now seen corresponding path program 1 times [2020-07-07 11:31:41,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:41,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108402028] [2020-07-07 11:31:41,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:31:41,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108402028] [2020-07-07 11:31:41,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052265027] [2020-07-07 11:31:41,765 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:31:41,832 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:31:41,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:41,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-07-07 11:31:41,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619589364] [2020-07-07 11:31:41,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:31:41,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:31:41,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:31:41,863 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 8 states. [2020-07-07 11:31:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:42,191 INFO L93 Difference]: Finished difference Result 179 states and 230 transitions. [2020-07-07 11:31:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:31:42,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-07-07 11:31:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:42,194 INFO L225 Difference]: With dead ends: 179 [2020-07-07 11:31:42,194 INFO L226 Difference]: Without dead ends: 128 [2020-07-07 11:31:42,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:31:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-07 11:31:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2020-07-07 11:31:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-07 11:31:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-07-07 11:31:42,213 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 39 [2020-07-07 11:31:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:42,213 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-07-07 11:31:42,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:31:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-07-07 11:31:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 11:31:42,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:42,219 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:42,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:42,435 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash -822197896, now seen corresponding path program 2 times [2020-07-07 11:31:42,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:42,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172823361] [2020-07-07 11:31:42,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:31:42,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172823361] [2020-07-07 11:31:42,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275849150] [2020-07-07 11:31:42,537 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:42,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:31:42,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:42,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 11:31:42,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-07 11:31:42,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:42,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2020-07-07 11:31:42,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178592742] [2020-07-07 11:31:42,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:31:42,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:42,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:31:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:31:42,684 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 8 states. [2020-07-07 11:31:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:42,846 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2020-07-07 11:31:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:31:42,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-07-07 11:31:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:42,848 INFO L225 Difference]: With dead ends: 129 [2020-07-07 11:31:42,848 INFO L226 Difference]: Without dead ends: 86 [2020-07-07 11:31:42,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:31:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-07 11:31:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-07-07 11:31:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-07 11:31:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-07-07 11:31:42,858 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 41 [2020-07-07 11:31:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:42,858 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-07-07 11:31:42,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:31:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-07-07 11:31:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-07 11:31:42,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:42,861 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-07-07 11:31:43,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:31:43,077 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:43,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:43,077 INFO L82 PathProgramCache]: Analyzing trace with hash -665199112, now seen corresponding path program 1 times [2020-07-07 11:31:43,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:43,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768844972] [2020-07-07 11:31:43,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 11:31:43,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768844972] [2020-07-07 11:31:43,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190759612] [2020-07-07 11:31:43,166 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:31:43,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 11:31:43,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:43,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-07-07 11:31:43,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436607104] [2020-07-07 11:31:43,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:31:43,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:31:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:31:43,305 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 9 states. [2020-07-07 11:31:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:43,630 INFO L93 Difference]: Finished difference Result 260 states and 340 transitions. [2020-07-07 11:31:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:31:43,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-07-07 11:31:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:43,632 INFO L225 Difference]: With dead ends: 260 [2020-07-07 11:31:43,633 INFO L226 Difference]: Without dead ends: 198 [2020-07-07 11:31:43,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:31:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-07 11:31:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 77. [2020-07-07 11:31:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-07 11:31:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2020-07-07 11:31:43,646 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 58 [2020-07-07 11:31:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:43,646 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2020-07-07 11:31:43,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:31:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2020-07-07 11:31:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 11:31:43,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:43,648 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-07-07 11:31:43,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:43,855 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:43,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:43,855 INFO L82 PathProgramCache]: Analyzing trace with hash -997532006, now seen corresponding path program 2 times [2020-07-07 11:31:43,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:43,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690741972] [2020-07-07 11:31:43,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-07 11:31:43,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690741972] [2020-07-07 11:31:43,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077491413] [2020-07-07 11:31:43,945 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:43,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:31:43,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:43,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:31:44,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 11:31:44,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:44,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2020-07-07 11:31:44,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871098056] [2020-07-07 11:31:44,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:31:44,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:44,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:31:44,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:31:44,119 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 10 states. [2020-07-07 11:31:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:44,568 INFO L93 Difference]: Finished difference Result 216 states and 294 transitions. [2020-07-07 11:31:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:31:44,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-07-07 11:31:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:44,575 INFO L225 Difference]: With dead ends: 216 [2020-07-07 11:31:44,575 INFO L226 Difference]: Without dead ends: 160 [2020-07-07 11:31:44,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:31:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-07 11:31:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 90. [2020-07-07 11:31:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-07 11:31:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2020-07-07 11:31:44,607 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 60 [2020-07-07 11:31:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:44,607 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2020-07-07 11:31:44,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:31:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2020-07-07 11:31:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 11:31:44,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:44,612 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-07-07 11:31:44,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:44,825 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:44,826 INFO L82 PathProgramCache]: Analyzing trace with hash 420057297, now seen corresponding path program 1 times [2020-07-07 11:31:44,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:44,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776739213] [2020-07-07 11:31:44,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-07-07 11:31:44,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776739213] [2020-07-07 11:31:44,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965482606] [2020-07-07 11:31:44,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:31:44,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-07 11:31:45,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:45,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-07-07 11:31:45,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795248964] [2020-07-07 11:31:45,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:31:45,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:45,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:31:45,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:31:45,023 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 11 states. [2020-07-07 11:31:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:45,746 INFO L93 Difference]: Finished difference Result 528 states and 725 transitions. [2020-07-07 11:31:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 11:31:45,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-07-07 11:31:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:45,751 INFO L225 Difference]: With dead ends: 528 [2020-07-07 11:31:45,751 INFO L226 Difference]: Without dead ends: 453 [2020-07-07 11:31:45,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:31:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-07-07 11:31:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 94. [2020-07-07 11:31:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-07 11:31:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-07-07 11:31:45,777 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 60 [2020-07-07 11:31:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:45,778 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-07-07 11:31:45,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:31:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-07-07 11:31:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-07 11:31:45,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:45,779 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-07-07 11:31:45,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:31:45,993 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:45,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1850595157, now seen corresponding path program 2 times [2020-07-07 11:31:45,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:45,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668781345] [2020-07-07 11:31:45,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 11:31:46,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668781345] [2020-07-07 11:31:46,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149281006] [2020-07-07 11:31:46,106 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:46,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:31:46,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:46,197 INFO L264 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:31:46,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 11:31:46,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:46,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-07-07 11:31:46,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160497667] [2020-07-07 11:31:46,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:31:46,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:46,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:31:46,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:31:46,234 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 11 states. [2020-07-07 11:31:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:46,655 INFO L93 Difference]: Finished difference Result 384 states and 524 transitions. [2020-07-07 11:31:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:31:46,655 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-07-07 11:31:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:46,658 INFO L225 Difference]: With dead ends: 384 [2020-07-07 11:31:46,658 INFO L226 Difference]: Without dead ends: 307 [2020-07-07 11:31:46,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:31:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-07-07 11:31:46,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 96. [2020-07-07 11:31:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-07 11:31:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-07-07 11:31:46,673 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 64 [2020-07-07 11:31:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:46,673 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-07-07 11:31:46,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:31:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-07-07 11:31:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-07 11:31:46,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:46,675 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-07-07 11:31:46,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:46,885 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash 728782455, now seen corresponding path program 3 times [2020-07-07 11:31:46,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:46,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343114329] [2020-07-07 11:31:46,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 11:31:47,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343114329] [2020-07-07 11:31:47,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445484216] [2020-07-07 11:31:47,001 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:47,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 11:31:47,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:47,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:31:47,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-07 11:31:47,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:47,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2020-07-07 11:31:47,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534257992] [2020-07-07 11:31:47,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:31:47,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:31:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:31:47,152 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 6 states. [2020-07-07 11:31:47,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:47,268 INFO L93 Difference]: Finished difference Result 202 states and 259 transitions. [2020-07-07 11:31:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:31:47,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-07-07 11:31:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:47,271 INFO L225 Difference]: With dead ends: 202 [2020-07-07 11:31:47,271 INFO L226 Difference]: Without dead ends: 125 [2020-07-07 11:31:47,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:31:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-07 11:31:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2020-07-07 11:31:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-07 11:31:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-07-07 11:31:47,288 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 66 [2020-07-07 11:31:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:47,289 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-07-07 11:31:47,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:31:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-07-07 11:31:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-07 11:31:47,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:47,291 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-07-07 11:31:47,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:47,507 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1402871403, now seen corresponding path program 1 times [2020-07-07 11:31:47,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:47,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995675619] [2020-07-07 11:31:47,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-07 11:31:47,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995675619] [2020-07-07 11:31:47,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606190028] [2020-07-07 11:31:47,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:31:47,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-07 11:31:47,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:47,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2020-07-07 11:31:47,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840238593] [2020-07-07 11:31:47,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:31:47,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:47,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:31:47,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:31:47,705 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 12 states. [2020-07-07 11:31:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:48,189 INFO L93 Difference]: Finished difference Result 406 states and 552 transitions. [2020-07-07 11:31:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:31:48,190 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-07-07 11:31:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:48,192 INFO L225 Difference]: With dead ends: 406 [2020-07-07 11:31:48,192 INFO L226 Difference]: Without dead ends: 329 [2020-07-07 11:31:48,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:31:48,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-07-07 11:31:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 98. [2020-07-07 11:31:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-07 11:31:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-07 11:31:48,215 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 69 [2020-07-07 11:31:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:48,216 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-07 11:31:48,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:31:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-07 11:31:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-07 11:31:48,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:48,217 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-07-07 11:31:48,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 11:31:48,433 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:48,434 INFO L82 PathProgramCache]: Analyzing trace with hash -973371469, now seen corresponding path program 2 times [2020-07-07 11:31:48,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:48,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955301400] [2020-07-07 11:31:48,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-07 11:31:48,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955301400] [2020-07-07 11:31:48,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626720578] [2020-07-07 11:31:48,543 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:48,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:31:48,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:48,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 11:31:48,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-07 11:31:48,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:48,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2020-07-07 11:31:48,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226609007] [2020-07-07 11:31:48,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:31:48,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:31:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:31:48,644 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 13 states. [2020-07-07 11:31:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:49,138 INFO L93 Difference]: Finished difference Result 443 states and 605 transitions. [2020-07-07 11:31:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:31:49,151 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-07-07 11:31:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:49,156 INFO L225 Difference]: With dead ends: 443 [2020-07-07 11:31:49,156 INFO L226 Difference]: Without dead ends: 366 [2020-07-07 11:31:49,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:31:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-07-07 11:31:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 100. [2020-07-07 11:31:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-07 11:31:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2020-07-07 11:31:49,174 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 71 [2020-07-07 11:31:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:49,175 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2020-07-07 11:31:49,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:31:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2020-07-07 11:31:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 11:31:49,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:49,176 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-07-07 11:31:49,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 11:31:49,390 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:49,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:49,391 INFO L82 PathProgramCache]: Analyzing trace with hash -540795311, now seen corresponding path program 3 times [2020-07-07 11:31:49,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:49,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338687334] [2020-07-07 11:31:49,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-07 11:31:49,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338687334] [2020-07-07 11:31:49,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090495350] [2020-07-07 11:31:49,497 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:49,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 11:31:49,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:49,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:31:49,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-07 11:31:49,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:49,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2020-07-07 11:31:49,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644158151] [2020-07-07 11:31:49,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:31:49,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:49,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:31:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:31:49,588 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand 4 states. [2020-07-07 11:31:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:49,597 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2020-07-07 11:31:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:31:49,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-07-07 11:31:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:49,598 INFO L225 Difference]: With dead ends: 112 [2020-07-07 11:31:49,598 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:31:49,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:31:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:31:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:31:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:31:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:31:49,600 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-07-07 11:31:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:49,600 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:31:49,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:31:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:31:49,600 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:31:49,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-07 11:31:49,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:31:50,089 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-07-07 11:31:50,089 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-07 11:31:50,089 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-07-07 11:31:50,089 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-07-07 11:31:50,089 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-07-07 11:31:50,090 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (or (not (<= |elem_exists_#in~size| 0)) (and (<= elem_exists_~i~0 0) (<= |elem_exists_#in~size| elem_exists_~size) (<= elem_exists_~size |elem_exists_#in~size|) (<= 0 elem_exists_~i~0))) [2020-07-07 11:31:50,090 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-07-07 11:31:50,090 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:31:50,090 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-07 11:31:50,090 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:31:50,090 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-07-07 11:31:50,090 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-07-07 11:31:50,090 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-07-07 11:31:50,091 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:31:50,091 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:31:50,091 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:31:50,091 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:31:50,091 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-07-07 11:31:50,091 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-07-07 11:31:50,091 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-07-07 11:31:50,091 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-07-07 11:31:50,092 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (<= main_~n~0 0) (= 0 main_~x~0)) [2020-07-07 11:31:50,092 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-07-07 11:31:50,092 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (<= main_~n~0 0) (= 0 main_~x~0)) [2020-07-07 11:31:50,092 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-07-07 11:31:50,092 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-07-07 11:31:50,092 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (<= main_~n~0 0) (= 0 main_~x~0)) [2020-07-07 11:31:50,093 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-07-07 11:31:50,093 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-07-07 11:31:50,093 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-07-07 11:31:50,093 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-07-07 11:31:50,093 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-07-07 11:31:50,093 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-07-07 11:31:50,093 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-07-07 11:31:50,093 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-07-07 11:31:50,094 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-07-07 11:31:50,094 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|)) [2020-07-07 11:31:50,094 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-07 11:31:50,094 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-07-07 11:31:50,094 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (and (<= main_~n~0 0) (<= 0 main_~x~0)) [2020-07-07 11:31:50,094 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-07-07 11:31:50,095 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-07-07 11:31:50,095 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (<= main_~n~0 0) (= 0 main_~x~0)) [2020-07-07 11:31:50,095 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-07-07 11:31:50,095 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= main_~n~0 0) (= 0 main_~x~0)) [2020-07-07 11:31:50,095 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-07-07 11:31:50,095 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-07-07 11:31:50,095 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-07-07 11:31:50,096 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-07-07 11:31:50,096 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~n~0 1)) [2020-07-07 11:31:50,096 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-07-07 11:31:50,096 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-07-07 11:31:50,096 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-07-07 11:31:50,096 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-07-07 11:31:50,096 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: (and (<= 0 main_~x~0) (<= 1 main_~y~0) (<= main_~n~0 1)) [2020-07-07 11:31:50,096 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-07-07 11:31:50,097 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-07-07 11:31:50,097 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-07-07 11:31:50,097 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-07-07 11:31:50,097 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-07-07 11:31:50,097 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-07-07 11:31:50,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:31:50 BoogieIcfgContainer [2020-07-07 11:31:50,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:31:50,120 INFO L168 Benchmark]: Toolchain (without parser) took 11730.23 ms. Allocated memory was 145.8 MB in the beginning and 314.6 MB in the end (delta: 168.8 MB). Free memory was 104.1 MB in the beginning and 172.9 MB in the end (delta: -68.8 MB). Peak memory consumption was 100.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:50,121 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:31:50,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.56 ms. Allocated memory is still 145.8 MB. Free memory was 103.7 MB in the beginning and 92.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:50,123 INFO L168 Benchmark]: Boogie Preprocessor took 151.85 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 92.7 MB in the beginning and 181.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:50,123 INFO L168 Benchmark]: RCFGBuilder took 492.80 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 157.0 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:50,124 INFO L168 Benchmark]: TraceAbstraction took 10805.17 ms. Allocated memory was 203.9 MB in the beginning and 314.6 MB in the end (delta: 110.6 MB). Free memory was 157.0 MB in the beginning and 172.9 MB in the end (delta: -15.9 MB). Peak memory consumption was 94.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:50,127 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.56 ms. Allocated memory is still 145.8 MB. Free memory was 103.7 MB in the beginning and 92.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 151.85 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 92.7 MB in the beginning and 181.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 492.80 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 157.0 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10805.17 ms. Allocated memory was 203.9 MB in the beginning and 314.6 MB in the end (delta: 110.6 MB). Free memory was 157.0 MB in the beginning and 172.9 MB in the end (delta: -15.9 MB). Peak memory consumption was 94.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: n <= 0 && 0 == x - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n <= 0 && 0 <= x - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: n <= 0 && 0 == x - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: n <= 0 && 0 == x - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: !(\old(size) <= 0) || (((i <= 0 && \old(size) <= size) && size <= \old(size)) && 0 <= i) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 0 <= x && n <= 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: n <= 0 && 0 == x - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: (0 <= x && 1 <= y) && n <= 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.4s, OverallIterations: 14, TraceHistogramMax: 8, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 906 SDtfs, 1751 SDslu, 2239 SDs, 0 SdLazy, 2498 SolverSat, 909 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 898 GetRequests, 744 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 1477 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 140 PreInvPairs, 167 NumberOfFragments, 105 HoareAnnotationTreeSize, 140 FomulaSimplifications, 3522 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 107 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 1358 NumberOfCodeBlocks, 1288 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1331 ConstructedInterpolants, 0 QuantifiedInterpolants, 111711 SizeOfPredicates, 26 NumberOfNonLiveVariables, 2401 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 27 InterpolantComputations, 7 PerfectInterpolantSequences, 475/858 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...