/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:46:56,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:46:56,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:46:56,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:46:56,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:46:56,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:46:56,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:46:56,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:46:56,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:46:56,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:46:56,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:46:56,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:46:56,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:46:56,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:46:56,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:46:56,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:46:56,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:46:56,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:46:56,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:46:56,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:46:56,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:46:56,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:46:56,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:46:56,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:46:56,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:46:56,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:46:56,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:46:56,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:46:56,729 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 [2020-11-06 22:46:56,755 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:46:56,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:46:56,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:46:56,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:46:56,758 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:46:56,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:46:56,758 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:46:56,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:46:56,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:46:56,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:46:56,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:46:56,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:46:56,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:46:56,759 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:46:56,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:46:56,760 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:46:56,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:46:56,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:46:56,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:46:56,761 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:46:56,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:46:56,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:56,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:46:56,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:46:56,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:46:56,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:46:56,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:46:56,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:46:56,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:46:56,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:46:57,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:46:57,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:46:57,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:46:57,163 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:46:57,163 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:46:57,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-11-06 22:46:57,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/144de0006/c92b8e525fc94a9897eab0ea54751154/FLAGdf7911a9f [2020-11-06 22:46:57,822 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:46:57,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-11-06 22:46:57,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/144de0006/c92b8e525fc94a9897eab0ea54751154/FLAGdf7911a9f [2020-11-06 22:46:58,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/144de0006/c92b8e525fc94a9897eab0ea54751154 [2020-11-06 22:46:58,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:46:58,179 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:46:58,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:58,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:46:58,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:46:58,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:58" (1/1) ... [2020-11-06 22:46:58,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@349fbdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58, skipping insertion in model container [2020-11-06 22:46:58,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:58" (1/1) ... [2020-11-06 22:46:58,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:46:58,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:46:58,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:58,392 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:46:58,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:58,434 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:46:58,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58 WrapperNode [2020-11-06 22:46:58,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:58,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:46:58,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:46:58,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:46:58,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58" (1/1) ... [2020-11-06 22:46:58,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58" (1/1) ... [2020-11-06 22:46:58,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58" (1/1) ... [2020-11-06 22:46:58,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58" (1/1) ... [2020-11-06 22:46:58,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58" (1/1) ... [2020-11-06 22:46:58,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58" (1/1) ... [2020-11-06 22:46:58,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58" (1/1) ... [2020-11-06 22:46:58,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:46:58,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:46:58,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:46:58,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:46:58,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58" (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 [2020-11-06 22:46:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:46:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:46:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:46:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:46:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:46:58,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:46:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:46:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:46:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:46:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:46:58,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:46:58,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:46:58,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-06 22:46:58,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:46:58,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:46:58,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:46:58,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:46:58,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:46:58,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:46:58,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:46:59,070 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:46:59,070 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:46:59,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:59 BoogieIcfgContainer [2020-11-06 22:46:59,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:46:59,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:46:59,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:46:59,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:46:59,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:58" (1/3) ... [2020-11-06 22:46:59,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658ffed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:59, skipping insertion in model container [2020-11-06 22:46:59,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:58" (2/3) ... [2020-11-06 22:46:59,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658ffed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:59, skipping insertion in model container [2020-11-06 22:46:59,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:59" (3/3) ... [2020-11-06 22:46:59,085 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-11-06 22:46:59,101 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:46:59,109 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:46:59,141 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:46:59,183 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:46:59,183 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:46:59,183 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:46:59,183 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:46:59,183 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:46:59,184 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:46:59,184 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:46:59,184 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:46:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-06 22:46:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:46:59,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:59,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:59,215 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1534369198, now seen corresponding path program 1 times [2020-11-06 22:46:59,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:59,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716790021] [2020-11-06 22:46:59,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:59,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:59,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716790021] [2020-11-06 22:46:59,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:59,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:46:59,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212590190] [2020-11-06 22:46:59,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:46:59,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:59,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:46:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:46:59,690 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2020-11-06 22:47:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:00,023 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-11-06 22:47:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:47:00,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-06 22:47:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:00,034 INFO L225 Difference]: With dead ends: 56 [2020-11-06 22:47:00,034 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:47:00,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:47:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:47:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:47:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:47:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-06 22:47:00,079 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-11-06 22:47:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:00,080 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-06 22:47:00,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:47:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-06 22:47:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:47:00,081 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:00,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:00,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:47:00,082 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:00,083 INFO L82 PathProgramCache]: Analyzing trace with hash 933992070, now seen corresponding path program 1 times [2020-11-06 22:47:00,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:00,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032700571] [2020-11-06 22:47:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:00,380 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-11-06 22:47:00,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:00,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032700571] [2020-11-06 22:47:00,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483174811] [2020-11-06 22:47:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -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 [2020-11-06 22:47:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:00,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 22:47:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:00,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-06 22:47:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:00,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:00,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-11-06 22:47:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971459193] [2020-11-06 22:47:00,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:47:00,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:47:00,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:47:00,880 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 14 states. [2020-11-06 22:47:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:01,407 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-11-06 22:47:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:47:01,408 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-11-06 22:47:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:01,409 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:47:01,409 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:47:01,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:47:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:47:01,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-06 22:47:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-06 22:47:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-11-06 22:47:01,418 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-11-06 22:47:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:01,418 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-06 22:47:01,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:47:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-11-06 22:47:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:47:01,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:01,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:01,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:47:01,634 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1097400953, now seen corresponding path program 1 times [2020-11-06 22:47:01,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:01,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352609287] [2020-11-06 22:47:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:02,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:02,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352609287] [2020-11-06 22:47:02,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865224478] [2020-11-06 22:47:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -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 [2020-11-06 22:47:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:02,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-06 22:47:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:02,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:02,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-11-06 22:47:02,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496696188] [2020-11-06 22:47:02,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-06 22:47:02,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:02,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-06 22:47:02,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:47:02,596 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 20 states. [2020-11-06 22:47:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:03,403 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-11-06 22:47:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:47:03,404 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2020-11-06 22:47:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:03,406 INFO L225 Difference]: With dead ends: 44 [2020-11-06 22:47:03,406 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 22:47:03,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:47:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 22:47:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-06 22:47:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 22:47:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-11-06 22:47:03,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-11-06 22:47:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:03,423 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-11-06 22:47:03,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-06 22:47:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-11-06 22:47:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:47:03,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:03,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:03,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:03,636 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash -945392280, now seen corresponding path program 1 times [2020-11-06 22:47:03,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:03,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109535812] [2020-11-06 22:47:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:03,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:03,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109535812] [2020-11-06 22:47:03,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298321945] [2020-11-06 22:47:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -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 [2020-11-06 22:47:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-06 22:47:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:04,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:04,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:04,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2020-11-06 22:47:04,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365094763] [2020-11-06 22:47:04,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-06 22:47:04,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:04,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-06 22:47:04,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:47:04,488 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 21 states. [2020-11-06 22:47:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:05,501 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-11-06 22:47:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:47:05,503 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-11-06 22:47:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:05,505 INFO L225 Difference]: With dead ends: 48 [2020-11-06 22:47:05,505 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:47:05,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:47:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:47:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-06 22:47:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:47:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-06 22:47:05,514 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2020-11-06 22:47:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:05,514 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-06 22:47:05,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-06 22:47:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-06 22:47:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 22:47:05,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:05,516 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:05,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:05,732 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:05,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1324006346, now seen corresponding path program 1 times [2020-11-06 22:47:05,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:05,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712092708] [2020-11-06 22:47:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:06,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:06,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712092708] [2020-11-06 22:47:06,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861702765] [2020-11-06 22:47:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -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 [2020-11-06 22:47:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:06,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-06 22:47:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:07,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:07,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:47:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:07,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:07,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2020-11-06 22:47:07,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391396842] [2020-11-06 22:47:07,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-06 22:47:07,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:07,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-06 22:47:07,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-11-06 22:47:07,247 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 26 states. [2020-11-06 22:47:08,295 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-11-06 22:47:08,473 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-11-06 22:47:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:08,809 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-11-06 22:47:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:47:08,810 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-06 22:47:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:08,811 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:47:08,811 INFO L226 Difference]: Without dead ends: 37 [2020-11-06 22:47:08,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2020-11-06 22:47:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-06 22:47:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-06 22:47:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-06 22:47:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-11-06 22:47:08,827 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2020-11-06 22:47:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:08,831 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-11-06 22:47:08,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-06 22:47:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-11-06 22:47:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:47:08,832 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:08,833 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:09,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:09,034 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:09,036 INFO L82 PathProgramCache]: Analyzing trace with hash -910228738, now seen corresponding path program 2 times [2020-11-06 22:47:09,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:09,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490379742] [2020-11-06 22:47:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:09,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:09,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490379742] [2020-11-06 22:47:09,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811344657] [2020-11-06 22:47:09,928 INFO L93 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 [2020-11-06 22:47:09,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:47:09,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:47:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-06 22:47:09,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:10,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:10,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2020-11-06 22:47:10,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658737922] [2020-11-06 22:47:10,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-06 22:47:10,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-06 22:47:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2020-11-06 22:47:10,751 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 32 states. [2020-11-06 22:47:11,198 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-06 22:47:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:12,585 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-11-06 22:47:12,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-06 22:47:12,586 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 33 [2020-11-06 22:47:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:12,587 INFO L225 Difference]: With dead ends: 62 [2020-11-06 22:47:12,588 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:47:12,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2020-11-06 22:47:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:47:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-11-06 22:47:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:47:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-11-06 22:47:12,599 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 33 [2020-11-06 22:47:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:12,599 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-11-06 22:47:12,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-06 22:47:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-11-06 22:47:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-06 22:47:12,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:12,603 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:12,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:47:12,805 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:12,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1026101115, now seen corresponding path program 3 times [2020-11-06 22:47:12,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:12,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734896359] [2020-11-06 22:47:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:12,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:12,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734896359] [2020-11-06 22:47:12,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644830404] [2020-11-06 22:47:12,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-11-06 22:47:13,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-06 22:47:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:47:13,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:47:13,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:17,456 WARN L194 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 14 [2020-11-06 22:47:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-06 22:47:17,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:17,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-11-06 22:47:17,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071273338] [2020-11-06 22:47:17,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:47:17,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:17,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:47:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2020-11-06 22:47:17,642 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2020-11-06 22:47:22,346 WARN L194 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-11-06 22:47:37,062 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 47 [2020-11-06 22:47:39,189 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 50 [2020-11-06 22:47:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:39,240 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-11-06 22:47:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:47:39,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-11-06 22:47:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:39,243 INFO L225 Difference]: With dead ends: 77 [2020-11-06 22:47:39,245 INFO L226 Difference]: Without dead ends: 66 [2020-11-06 22:47:39,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=100, Invalid=547, Unknown=3, NotChecked=0, Total=650 [2020-11-06 22:47:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-06 22:47:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-11-06 22:47:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-06 22:47:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-11-06 22:47:39,270 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 41 [2020-11-06 22:47:39,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:39,271 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-11-06 22:47:39,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:47:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-11-06 22:47:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-06 22:47:39,273 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:39,273 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:39,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:39,475 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:39,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:39,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1079394467, now seen corresponding path program 4 times [2020-11-06 22:47:39,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:39,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50987051] [2020-11-06 22:47:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:40,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:40,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50987051] [2020-11-06 22:47:40,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914810699] [2020-11-06 22:47:40,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-11-06 22:47:40,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:47:40,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:47:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-06 22:47:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:41,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:41,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:47:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:42,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:42,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2020-11-06 22:47:42,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888462575] [2020-11-06 22:47:42,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-06 22:47:42,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:42,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-06 22:47:42,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2020-11-06 22:47:42,014 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 38 states. [2020-11-06 22:47:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:44,529 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2020-11-06 22:47:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:47:44,530 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-11-06 22:47:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:44,531 INFO L225 Difference]: With dead ends: 96 [2020-11-06 22:47:44,531 INFO L226 Difference]: Without dead ends: 66 [2020-11-06 22:47:44,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=258, Invalid=3048, Unknown=0, NotChecked=0, Total=3306 [2020-11-06 22:47:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-06 22:47:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-11-06 22:47:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-06 22:47:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-11-06 22:47:44,543 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 42 [2020-11-06 22:47:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:44,544 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-11-06 22:47:44,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-06 22:47:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-11-06 22:47:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-06 22:47:44,545 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:44,545 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:44,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:44,761 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:44,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1974132196, now seen corresponding path program 5 times [2020-11-06 22:47:44,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:44,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702036179] [2020-11-06 22:47:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:46,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:46,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702036179] [2020-11-06 22:47:46,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715065478] [2020-11-06 22:47:46,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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