/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 03:01:02,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 03:01:02,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 03:01:02,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 03:01:02,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 03:01:02,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 03:01:02,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 03:01:02,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 03:01:02,153 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 03:01:02,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 03:01:02,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 03:01:02,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 03:01:02,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 03:01:02,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 03:01:02,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 03:01:02,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 03:01:02,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 03:01:02,155 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 03:01:02,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 03:01:02,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 03:01:02,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 03:01:02,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 03:01:02,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 03:01:02,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:01:02,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 03:01:02,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 03:01:02,156 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 03:01:02,156 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 03:01:02,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 03:01:02,156 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 03:01:02,156 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 03:01:02,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 03:01:02,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 03:01:02,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 03:01:02,341 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 03:01:02,342 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 03:01:02,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound50.c [2022-03-18 03:01:02,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08fca8cc6/4c3be4700f204a2a95dedbbfb8d28d28/FLAG1bf530c91 [2022-03-18 03:01:02,765 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 03:01:02,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound50.c [2022-03-18 03:01:02,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08fca8cc6/4c3be4700f204a2a95dedbbfb8d28d28/FLAG1bf530c91 [2022-03-18 03:01:02,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08fca8cc6/4c3be4700f204a2a95dedbbfb8d28d28 [2022-03-18 03:01:02,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 03:01:02,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 03:01:02,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 03:01:02,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 03:01:02,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 03:01:02,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:02,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f6a80e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02, skipping insertion in model container [2022-03-18 03:01:02,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:02,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 03:01:02,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 03:01:02,941 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound50.c[525,538] [2022-03-18 03:01:02,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:01:02,960 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 03:01:02,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound50.c[525,538] [2022-03-18 03:01:02,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:01:02,984 INFO L208 MainTranslator]: Completed translation [2022-03-18 03:01:02,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02 WrapperNode [2022-03-18 03:01:02,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 03:01:02,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 03:01:02,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 03:01:02,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 03:01:02,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:02,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:02,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:02,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:03,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:03,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:03,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:03,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 03:01:03,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 03:01:03,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 03:01:03,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 03:01:03,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02" (1/1) ... [2022-03-18 03:01:03,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:01:03,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:01:03,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 03:01:03,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 03:01:03,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 03:01:03,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 03:01:03,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 03:01:03,083 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 03:01:03,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 03:01:03,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 03:01:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 03:01:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 03:01:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 03:01:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 03:01:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 03:01:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 03:01:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 03:01:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 03:01:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 03:01:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 03:01:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 03:01:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 03:01:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 03:01:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 03:01:03,131 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 03:01:03,132 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 03:01:03,228 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 03:01:03,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 03:01:03,231 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 03:01:03,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:01:03 BoogieIcfgContainer [2022-03-18 03:01:03,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 03:01:03,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 03:01:03,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 03:01:03,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 03:01:03,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 03:01:02" (1/3) ... [2022-03-18 03:01:03,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23170c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:01:03, skipping insertion in model container [2022-03-18 03:01:03,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:01:02" (2/3) ... [2022-03-18 03:01:03,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23170c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:01:03, skipping insertion in model container [2022-03-18 03:01:03,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:01:03" (3/3) ... [2022-03-18 03:01:03,243 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound50.c [2022-03-18 03:01:03,246 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 03:01:03,246 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 03:01:03,279 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 03:01:03,286 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 03:01:03,287 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 03:01:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 03:01:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 03:01:03,304 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:01:03,304 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:01:03,305 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:01:03,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:01:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2022-03-18 03:01:03,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:01:03,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1425248068] [2022-03-18 03:01:03,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:01:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 2 times [2022-03-18 03:01:03,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:01:03,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381556402] [2022-03-18 03:01:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:01:03,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:01:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:01:03,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:01:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:01:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:01:03,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:01:03,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381556402] [2022-03-18 03:01:03,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381556402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:01:03,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:01:03,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:01:03,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:01:03,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1425248068] [2022-03-18 03:01:03,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1425248068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:01:03,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:01:03,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:01:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650487533] [2022-03-18 03:01:03,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:01:03,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 03:01:03,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:01:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 03:01:03,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 03:01:03,512 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 03:01:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:01:03,546 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-03-18 03:01:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 03:01:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 03:01:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:01:03,565 INFO L225 Difference]: With dead ends: 39 [2022-03-18 03:01:03,565 INFO L226 Difference]: Without dead ends: 18 [2022-03-18 03:01:03,567 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 03:01:03,569 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:01:03,570 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:01:03,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-18 03:01:03,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-03-18 03:01:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:01:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 03:01:03,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-03-18 03:01:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:01:03,601 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 03:01:03,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 03:01:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 03:01:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 03:01:03,603 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:01:03,603 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:01:03,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 03:01:03,604 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:01:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:01:03,605 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2022-03-18 03:01:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:01:03,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311656594] [2022-03-18 03:01:03,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:01:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 2 times [2022-03-18 03:01:03,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:01:03,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116328313] [2022-03-18 03:01:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:01:03,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:01:03,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:01:03,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618243243] [2022-03-18 03:01:03,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:01:03,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:01:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:01:03,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:01:03,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 03:01:03,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 03:01:03,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:01:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 03:01:03,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:01:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:01:03,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:01:03,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:01:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116328313] [2022-03-18 03:01:03,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:01:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618243243] [2022-03-18 03:01:03,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618243243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:01:03,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:01:03,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:01:03,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:01:03,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311656594] [2022-03-18 03:01:03,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311656594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:01:03,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:01:03,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:01:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001879744] [2022-03-18 03:01:03,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:01:03,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 03:01:03,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:01:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 03:01:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 03:01:03,781 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 03:01:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:01:03,790 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-03-18 03:01:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 03:01:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 03:01:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:01:03,791 INFO L225 Difference]: With dead ends: 26 [2022-03-18 03:01:03,792 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 03:01:03,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 03:01:03,793 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:01:03,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:01:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 03:01:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-18 03:01:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:01:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-18 03:01:03,797 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-03-18 03:01:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:01:03,798 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-18 03:01:03,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 03:01:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-18 03:01:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 03:01:03,798 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:01:03,798 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:01:03,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 03:01:04,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:01:04,003 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:01:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:01:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2022-03-18 03:01:04,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:01:04,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958362830] [2022-03-18 03:01:04,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:01:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 2 times [2022-03-18 03:01:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:01:04,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514711787] [2022-03-18 03:01:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:01:04,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:01:04,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:01:04,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318651905] [2022-03-18 03:01:04,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:01:04,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:01:04,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:01:04,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:01:04,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 03:01:04,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 03:01:04,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:01:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:01:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:01:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:01:04,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:01:04,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:01:04,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514711787] [2022-03-18 03:01:04,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:01:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318651905] [2022-03-18 03:01:04,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318651905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:01:04,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:01:04,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:01:04,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:01:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958362830] [2022-03-18 03:01:04,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958362830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:01:04,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:01:04,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:01:04,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517048673] [2022-03-18 03:01:04,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:01:04,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:01:04,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:01:04,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:01:04,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:01:04,105 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 03:01:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:01:04,129 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-03-18 03:01:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:01:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 03:01:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:01:04,131 INFO L225 Difference]: With dead ends: 28 [2022-03-18 03:01:04,131 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 03:01:04,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:01:04,132 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:01:04,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:01:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 03:01:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 03:01:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 03:01:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-03-18 03:01:04,137 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-03-18 03:01:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:01:04,142 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-03-18 03:01:04,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 03:01:04,142 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-03-18 03:01:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 03:01:04,143 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:01:04,143 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:01:04,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 03:01:04,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 03:01:04,344 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:01:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:01:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2022-03-18 03:01:04,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:01:04,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2002580067]