/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 05:28:50,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 05:28:50,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 05:28:50,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 05:28:51,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 05:28:51,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 05:28:51,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 05:28:51,026 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 05:28:51,037 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 05:28:51,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 05:28:51,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 05:28:51,040 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 05:28:51,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 05:28:51,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 05:28:51,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 05:28:51,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 05:28:51,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 05:28:51,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 05:28:51,041 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 05:28:51,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 05:28:51,041 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 05:28:51,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 05:28:51,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 05:28:51,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 05:28:51,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 05:28:51,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 05:28:51,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:28:51,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 05:28:51,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 05:28:51,043 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 05:28:51,043 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 05:28:51,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 05:28:51,043 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 05:28:51,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 05:28:51,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 05:28:51,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 05:28:51,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 05:28:51,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 05:28:51,279 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 05:28:51,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2022-03-19 05:28:51,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a62af5549/678eae75ae1243f684af497cbaf6d5c9/FLAG8aeda2c55 [2022-03-19 05:28:51,728 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 05:28:51,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2022-03-19 05:28:51,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a62af5549/678eae75ae1243f684af497cbaf6d5c9/FLAG8aeda2c55 [2022-03-19 05:28:51,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a62af5549/678eae75ae1243f684af497cbaf6d5c9 [2022-03-19 05:28:51,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 05:28:51,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 05:28:51,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 05:28:51,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 05:28:51,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 05:28:51,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:51,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e865f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51, skipping insertion in model container [2022-03-19 05:28:51,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:51,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 05:28:51,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 05:28:51,905 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/hard2_valuebound50.c[526,539] [2022-03-19 05:28:51,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:28:51,923 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 05:28:51,933 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/hard2_valuebound50.c[526,539] [2022-03-19 05:28:51,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:28:51,948 INFO L208 MainTranslator]: Completed translation [2022-03-19 05:28:51,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51 WrapperNode [2022-03-19 05:28:51,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 05:28:51,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 05:28:51,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 05:28:51,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 05:28:51,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:51,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:51,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:51,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:51,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:51,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:51,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:51,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 05:28:51,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 05:28:51,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 05:28:51,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 05:28:51,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51" (1/1) ... [2022-03-19 05:28:52,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:28:52,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:52,021 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) [2022-03-19 05:28:52,031 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 [2022-03-19 05:28:52,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 05:28:52,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 05:28:52,053 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 05:28:52,053 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 05:28:52,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 05:28:52,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 05:28:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 05:28:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 05:28:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 05:28:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 05:28:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 05:28:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 05:28:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 05:28:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 05:28:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 05:28:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 05:28:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 05:28:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 05:28:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 05:28:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 05:28:52,109 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 05:28:52,110 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 05:28:52,241 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 05:28:52,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 05:28:52,246 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 05:28:52,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:28:52 BoogieIcfgContainer [2022-03-19 05:28:52,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 05:28:52,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 05:28:52,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 05:28:52,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 05:28:52,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 05:28:51" (1/3) ... [2022-03-19 05:28:52,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254513f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:28:52, skipping insertion in model container [2022-03-19 05:28:52,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:28:51" (2/3) ... [2022-03-19 05:28:52,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254513f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:28:52, skipping insertion in model container [2022-03-19 05:28:52,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:28:52" (3/3) ... [2022-03-19 05:28:52,270 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.c [2022-03-19 05:28:52,289 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 05:28:52,289 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 05:28:52,317 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 05:28:52,322 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 [2022-03-19 05:28:52,322 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 05:28:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 05:28:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 05:28:52,342 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:52,343 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:52,343 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-03-19 05:28:52,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:52,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302852663] [2022-03-19 05:28:52,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:28:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 2 times [2022-03-19 05:28:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:52,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332541396] [2022-03-19 05:28:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:52,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:28:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:52,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:28:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 05:28:52,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:52,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332541396] [2022-03-19 05:28:52,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332541396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:52,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:52,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:28:52,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:52,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302852663] [2022-03-19 05:28:52,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302852663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:52,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:52,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:28:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735603912] [2022-03-19 05:28:52,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:52,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 05:28:52,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 05:28:52,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 05:28:52,613 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 05:28:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:52,691 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-03-19 05:28:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 05:28:52,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 05:28:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:52,700 INFO L225 Difference]: With dead ends: 61 [2022-03-19 05:28:52,700 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 05:28:52,702 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 05:28:52,705 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:52,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:28:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 05:28:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 05:28:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 05:28:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-19 05:28:52,739 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-19 05:28:52,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:52,740 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-19 05:28:52,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 05:28:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-19 05:28:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 05:28:52,741 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:52,741 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:52,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 05:28:52,741 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-03-19 05:28:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:52,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575290583] [2022-03-19 05:28:52,743 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:28:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 2 times [2022-03-19 05:28:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:52,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260895768] [2022-03-19 05:28:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:52,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:52,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:28:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:52,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:28:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 05:28:52,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:52,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260895768] [2022-03-19 05:28:52,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260895768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:52,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:52,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:28:52,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:52,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575290583] [2022-03-19 05:28:52,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575290583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:52,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:52,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:28:52,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801834956] [2022-03-19 05:28:52,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:52,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:28:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:28:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:28:52,835 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 05:28:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:52,994 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-03-19 05:28:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:28:52,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 05:28:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:52,996 INFO L225 Difference]: With dead ends: 43 [2022-03-19 05:28:52,996 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 05:28:52,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:28:52,998 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:52,998 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:28:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 05:28:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-19 05:28:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 05:28:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-19 05:28:53,010 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-19 05:28:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:53,011 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-19 05:28:53,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 05:28:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-19 05:28:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 05:28:53,012 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:53,012 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:53,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 05:28:53,012 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-03-19 05:28:53,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:53,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1416580659] [2022-03-19 05:28:53,017 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:28:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 2 times [2022-03-19 05:28:53,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:53,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680762782] [2022-03-19 05:28:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:53,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:28:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:53,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:28:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:53,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 05:28:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:28:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 05:28:53,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:53,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680762782] [2022-03-19 05:28:53,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680762782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:53,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:53,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:28:53,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1416580659] [2022-03-19 05:28:53,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1416580659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:53,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:53,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:28:53,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245329623] [2022-03-19 05:28:53,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:53,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:28:53,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:28:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:28:53,149 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 05:28:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:53,324 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-19 05:28:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:28:53,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 05:28:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:53,330 INFO L225 Difference]: With dead ends: 47 [2022-03-19 05:28:53,330 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 05:28:53,332 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:28:53,336 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:53,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:28:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 05:28:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-19 05:28:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 05:28:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-19 05:28:53,355 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-19 05:28:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:53,356 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-19 05:28:53,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 05:28:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-19 05:28:53,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 05:28:53,357 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:53,357 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:53,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 05:28:53,357 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-03-19 05:28:53,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:53,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86629606] [2022-03-19 05:28:53,362 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:28:53,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 2 times [2022-03-19 05:28:53,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:53,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127974083] [2022-03-19 05:28:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:53,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:53,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:28:53,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464757349] [2022-03-19 05:28:53,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:28:53,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:53,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:53,408 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) [2022-03-19 05:28:53,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 05:28:53,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:28:53,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:28:53,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 05:28:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:28:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:28:53,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:28:53,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:53,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127974083] [2022-03-19 05:28:53,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:53,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464757349] [2022-03-19 05:28:53,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464757349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:53,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:53,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:28:53,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:53,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86629606] [2022-03-19 05:28:53,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86629606] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:53,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:53,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:28:53,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027183797] [2022-03-19 05:28:53,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:53,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:28:53,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:53,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:28:53,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:28:53,665 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 05:28:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:53,727 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-19 05:28:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:28:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-19 05:28:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:53,733 INFO L225 Difference]: With dead ends: 66 [2022-03-19 05:28:53,733 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 05:28:53,738 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:28:53,742 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:53,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:28:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 05:28:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 05:28:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 05:28:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-19 05:28:53,756 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-03-19 05:28:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:53,756 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-19 05:28:53,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 05:28:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-19 05:28:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 05:28:53,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:53,758 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:53,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 05:28:53,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:53,980 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2022-03-19 05:28:53,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:53,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133774118] [2022-03-19 05:28:53,981 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:28:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 2 times [2022-03-19 05:28:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:53,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972784497] [2022-03-19 05:28:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:54,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:28:54,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237650567] [2022-03-19 05:28:54,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:28:54,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:54,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:54,015 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) [2022-03-19 05:28:54,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 05:28:54,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:28:54,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:28:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 05:28:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:28:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 05:28:54,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:28:54,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972784497] [2022-03-19 05:28:54,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237650567] [2022-03-19 05:28:54,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237650567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:54,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:54,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:28:54,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:54,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133774118] [2022-03-19 05:28:54,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133774118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:54,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:54,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:28:54,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276900773] [2022-03-19 05:28:54,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:54,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:28:54,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:28:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:28:54,153 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:28:54,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:54,203 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-03-19 05:28:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:28:54,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-19 05:28:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:54,208 INFO L225 Difference]: With dead ends: 65 [2022-03-19 05:28:54,208 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 05:28:54,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:28:54,211 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:54,213 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:28:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 05:28:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-19 05:28:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 05:28:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-03-19 05:28:54,233 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-03-19 05:28:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:54,234 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-03-19 05:28:54,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:28:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-03-19 05:28:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 05:28:54,237 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:54,237 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:54,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 05:28:54,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:54,451 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2022-03-19 05:28:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775184194] [2022-03-19 05:28:54,474 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:28:54,474 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:28:54,474 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:28:54,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 2 times [2022-03-19 05:28:54,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:54,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370854715] [2022-03-19 05:28:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:54,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:54,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:28:54,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549125310] [2022-03-19 05:28:54,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:28:54,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:54,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:54,485 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:28:54,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 05:28:54,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:28:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:28:54,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 05:28:54,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:28:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 05:28:54,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:28:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 05:28:54,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:54,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370854715] [2022-03-19 05:28:54,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:54,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549125310] [2022-03-19 05:28:54,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549125310] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 05:28:54,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:28:54,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 05:28:54,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:54,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775184194] [2022-03-19 05:28:54,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775184194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:54,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:54,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:28:54,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549847973] [2022-03-19 05:28:54,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:54,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:28:54,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:54,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:28:54,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 05:28:54,831 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:28:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:54,886 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-03-19 05:28:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:28:54,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-03-19 05:28:54,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:54,889 INFO L225 Difference]: With dead ends: 69 [2022-03-19 05:28:54,889 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 05:28:54,889 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 05:28:54,890 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:54,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:28:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 05:28:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-03-19 05:28:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 05:28:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-19 05:28:54,901 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-03-19 05:28:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:54,902 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-19 05:28:54,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:28:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-19 05:28:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 05:28:54,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:54,903 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:54,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 05:28:55,117 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:55,118 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2022-03-19 05:28:55,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:55,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [271740631] [2022-03-19 05:28:55,123 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:28:55,123 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:28:55,123 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:28:55,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 2 times [2022-03-19 05:28:55,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:55,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117295316] [2022-03-19 05:28:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:55,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:55,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:28:55,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103711073] [2022-03-19 05:28:55,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:28:55,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:55,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:28:55,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 05:28:55,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:28:55,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:28:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 05:28:55,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:28:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 05:28:55,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:28:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 05:28:56,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117295316] [2022-03-19 05:28:56,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103711073] [2022-03-19 05:28:56,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103711073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:28:56,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:28:56,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-19 05:28:56,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:56,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [271740631] [2022-03-19 05:28:56,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [271740631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:56,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:56,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 05:28:56,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850271317] [2022-03-19 05:28:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:56,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 05:28:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 05:28:56,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:28:56,444 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 05:28:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:56,575 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-03-19 05:28:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:28:56,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2022-03-19 05:28:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:56,578 INFO L225 Difference]: With dead ends: 130 [2022-03-19 05:28:56,578 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 05:28:56,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-19 05:28:56,579 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:56,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 239 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:28:56,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 05:28:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-03-19 05:28:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 05:28:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-03-19 05:28:56,594 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 64 [2022-03-19 05:28:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:56,595 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-03-19 05:28:56,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 05:28:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-03-19 05:28:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 05:28:56,597 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:56,597 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:56,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 05:28:56,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:56,823 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 3 times [2022-03-19 05:28:56,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:56,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111011218] [2022-03-19 05:28:56,828 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:28:56,828 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:28:56,828 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:28:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 4 times [2022-03-19 05:28:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:56,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940194012] [2022-03-19 05:28:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:56,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:28:56,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360045261] [2022-03-19 05:28:56,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:28:56,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:56,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:56,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:28:56,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 05:28:56,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:28:56,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:28:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 05:28:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:28:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 05:28:57,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:28:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 05:28:58,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940194012] [2022-03-19 05:28:58,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360045261] [2022-03-19 05:28:58,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360045261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:28:58,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:28:58,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-19 05:28:58,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:58,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111011218] [2022-03-19 05:28:58,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111011218] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:58,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:58,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:28:58,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430255912] [2022-03-19 05:28:58,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:58,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:28:58,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:58,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:28:58,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 05:28:58,612 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 05:28:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:58,709 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-03-19 05:28:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 05:28:58,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-03-19 05:28:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:58,711 INFO L225 Difference]: With dead ends: 126 [2022-03-19 05:28:58,712 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 05:28:58,712 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-19 05:28:58,713 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:58,713 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 199 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:28:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 05:28:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 05:28:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 05:28:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-03-19 05:28:58,728 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 69 [2022-03-19 05:28:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:58,728 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-03-19 05:28:58,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 05:28:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-03-19 05:28:58,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 05:28:58,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:58,730 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:58,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 05:28:58,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:58,952 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:28:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:28:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2022-03-19 05:28:58,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:58,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [821758562] [2022-03-19 05:28:58,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:28:58,956 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:28:58,956 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:28:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 2 times [2022-03-19 05:28:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:28:58,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335071440] [2022-03-19 05:28:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:28:58,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:28:58,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:28:58,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963209392] [2022-03-19 05:28:58,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:28:58,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:28:58,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:28:58,978 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:28:58,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 05:28:59,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:28:59,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:28:59,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 05:28:59,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:28:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-19 05:28:59,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:28:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-19 05:28:59,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:28:59,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335071440] [2022-03-19 05:28:59,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:28:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963209392] [2022-03-19 05:28:59,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963209392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:28:59,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:28:59,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-19 05:28:59,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:28:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [821758562] [2022-03-19 05:28:59,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [821758562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:28:59,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:28:59,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 05:28:59,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200795961] [2022-03-19 05:28:59,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:28:59,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 05:28:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:28:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 05:28:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:28:59,764 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 05:28:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:28:59,960 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2022-03-19 05:28:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 05:28:59,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-03-19 05:28:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:28:59,961 INFO L225 Difference]: With dead ends: 109 [2022-03-19 05:28:59,961 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 05:28:59,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-19 05:28:59,962 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:28:59,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 207 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:28:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 05:28:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-19 05:28:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.125) internal successors, (54), 51 states have internal predecessors, (54), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 05:28:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2022-03-19 05:28:59,972 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 75 [2022-03-19 05:28:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:28:59,972 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2022-03-19 05:28:59,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 05:28:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2022-03-19 05:28:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 05:28:59,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:28:59,973 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:28:59,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 05:29:00,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:29:00,174 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:29:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:29:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 5 times [2022-03-19 05:29:00,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:29:00,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1625784060] [2022-03-19 05:29:00,178 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:29:00,178 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:29:00,178 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:29:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 6 times [2022-03-19 05:29:00,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:29:00,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834973732] [2022-03-19 05:29:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:29:00,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:29:00,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:29:00,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302269566] [2022-03-19 05:29:00,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:29:00,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:29:00,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:29:00,187 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:29:00,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 05:29:00,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 05:29:00,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:29:00,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 05:29:00,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:29:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 05:29:00,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:29:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 05:29:59,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:29:59,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834973732] [2022-03-19 05:29:59,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:29:59,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302269566] [2022-03-19 05:29:59,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302269566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:29:59,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:29:59,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-03-19 05:29:59,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:29:59,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1625784060] [2022-03-19 05:29:59,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1625784060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:29:59,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:29:59,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:29:59,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225331156] [2022-03-19 05:29:59,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:29:59,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:29:59,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:29:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:29:59,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:29:59,521 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 05:30:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:30:00,792 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2022-03-19 05:30:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 05:30:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 81 [2022-03-19 05:30:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:30:00,794 INFO L225 Difference]: With dead ends: 106 [2022-03-19 05:30:00,794 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 05:30:00,794 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-03-19 05:30:00,795 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:30:00,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 130 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:30:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 05:30:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-03-19 05:30:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 05:30:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-03-19 05:30:00,805 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 81 [2022-03-19 05:30:00,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:30:00,805 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-03-19 05:30:00,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 05:30:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-03-19 05:30:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 05:30:00,806 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:30:00,807 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:30:00,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 05:30:01,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:01,031 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:30:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:30:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 7 times [2022-03-19 05:30:01,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:01,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180743221] [2022-03-19 05:30:01,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:30:01,034 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:30:01,034 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:30:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 8 times [2022-03-19 05:30:01,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:30:01,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60688418] [2022-03-19 05:30:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:30:01,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:30:01,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:30:01,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165182425] [2022-03-19 05:30:01,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:30:01,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:01,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:30:01,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:30:01,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 05:30:01,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:30:01,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:30:01,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 05:30:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:30:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 05:30:01,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:30:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-19 05:30:02,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:30:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60688418] [2022-03-19 05:30:02,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:30:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165182425] [2022-03-19 05:30:02,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165182425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:30:02,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:30:02,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-19 05:30:02,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:30:02,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180743221] [2022-03-19 05:30:02,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180743221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:30:02,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:30:02,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 05:30:02,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378520822] [2022-03-19 05:30:02,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:30:02,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 05:30:02,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:02,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 05:30:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-19 05:30:02,530 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-19 05:30:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:30:02,640 INFO L93 Difference]: Finished difference Result 170 states and 221 transitions. [2022-03-19 05:30:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:30:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 86 [2022-03-19 05:30:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:30:02,642 INFO L225 Difference]: With dead ends: 170 [2022-03-19 05:30:02,642 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 05:30:02,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:30:02,643 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:30:02,643 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 277 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:30:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 05:30:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-19 05:30:02,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.141025641025641) internal successors, (89), 82 states have internal predecessors, (89), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 05:30:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2022-03-19 05:30:02,657 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 86 [2022-03-19 05:30:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:30:02,657 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2022-03-19 05:30:02,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-19 05:30:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2022-03-19 05:30:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-19 05:30:02,659 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:30:02,659 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:30:02,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 05:30:02,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 05:30:02,868 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:30:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:30:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 9 times [2022-03-19 05:30:02,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:02,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [435400432] [2022-03-19 05:30:02,871 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:30:02,871 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:30:02,871 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:30:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 10 times [2022-03-19 05:30:02,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:30:02,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977722015] [2022-03-19 05:30:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:30:02,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:30:02,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:30:02,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765813277] [2022-03-19 05:30:02,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:30:02,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:02,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:30:02,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:30:02,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 05:30:02,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:30:02,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:30:02,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 05:30:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:30:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 05:30:03,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:30:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 05:30:17,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:30:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977722015] [2022-03-19 05:30:17,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:30:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765813277] [2022-03-19 05:30:17,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765813277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:30:17,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:30:17,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-19 05:30:17,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:30:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [435400432] [2022-03-19 05:30:17,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [435400432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:30:17,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:30:17,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 05:30:17,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244772959] [2022-03-19 05:30:17,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:30:17,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 05:30:17,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:17,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 05:30:17,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:30:17,015 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:30:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:30:17,218 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2022-03-19 05:30:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 05:30:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2022-03-19 05:30:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:30:17,219 INFO L225 Difference]: With dead ends: 164 [2022-03-19 05:30:17,220 INFO L226 Difference]: Without dead ends: 157 [2022-03-19 05:30:17,220 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-19 05:30:17,220 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:30:17,221 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 425 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:30:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-19 05:30:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-03-19 05:30:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 100 states have internal predecessors, (106), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 05:30:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 175 transitions. [2022-03-19 05:30:17,235 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 175 transitions. Word has length 94 [2022-03-19 05:30:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:30:17,236 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 175 transitions. [2022-03-19 05:30:17,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:30:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 175 transitions. [2022-03-19 05:30:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 05:30:17,237 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:30:17,237 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:30:17,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 05:30:17,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:17,439 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:30:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:30:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 11 times [2022-03-19 05:30:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1231459693] [2022-03-19 05:30:17,443 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:30:17,443 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:30:17,443 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:30:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 12 times [2022-03-19 05:30:17,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:30:17,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840121293] [2022-03-19 05:30:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:30:17,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:30:17,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:30:17,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043815665] [2022-03-19 05:30:17,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:30:17,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:17,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:30:17,451 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:30:17,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 05:30:17,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 05:30:17,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:30:17,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 05:30:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:30:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-03-19 05:30:17,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:30:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 69 proven. 23 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-03-19 05:30:18,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:30:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840121293] [2022-03-19 05:30:18,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:30:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043815665] [2022-03-19 05:30:18,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043815665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:30:18,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:30:18,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-19 05:30:18,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:30:18,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1231459693] [2022-03-19 05:30:18,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1231459693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:30:18,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:30:18,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 05:30:18,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594010883] [2022-03-19 05:30:18,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:30:18,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 05:30:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 05:30:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-19 05:30:18,692 INFO L87 Difference]: Start difference. First operand 154 states and 175 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 05:30:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:30:18,808 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2022-03-19 05:30:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 05:30:18,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2022-03-19 05:30:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:30:18,810 INFO L225 Difference]: With dead ends: 164 [2022-03-19 05:30:18,810 INFO L226 Difference]: Without dead ends: 162 [2022-03-19 05:30:18,811 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-19 05:30:18,811 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:30:18,811 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 138 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:30:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-19 05:30:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-03-19 05:30:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 106 states have internal predecessors, (112), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 05:30:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2022-03-19 05:30:18,827 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 103 [2022-03-19 05:30:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:30:18,828 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2022-03-19 05:30:18,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 05:30:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2022-03-19 05:30:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 05:30:18,829 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:30:18,829 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:30:18,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 05:30:19,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 05:30:19,053 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:30:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:30:19,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 3 times [2022-03-19 05:30:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:19,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [722614698] [2022-03-19 05:30:19,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:30:19,057 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:30:19,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:30:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 4 times [2022-03-19 05:30:19,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:30:19,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118903485] [2022-03-19 05:30:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:30:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:30:19,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:30:19,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800728034] [2022-03-19 05:30:19,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:30:19,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:19,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:30:19,067 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:30:19,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 05:30:19,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:30:19,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:30:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 05:30:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:30:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 05:30:19,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:30:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 05:30:23,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:30:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118903485] [2022-03-19 05:30:23,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:30:23,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800728034] [2022-03-19 05:30:23,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800728034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:30:23,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:30:23,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-03-19 05:30:23,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:30:23,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [722614698] [2022-03-19 05:30:23,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [722614698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:30:23,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:30:23,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:30:23,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385132907] [2022-03-19 05:30:23,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:30:23,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:30:23,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:23,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:30:23,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:30:23,952 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 05:30:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:30:24,141 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2022-03-19 05:30:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 05:30:24,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2022-03-19 05:30:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:30:24,145 INFO L225 Difference]: With dead ends: 171 [2022-03-19 05:30:24,146 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 05:30:24,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-19 05:30:24,146 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:30:24,146 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 414 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:30:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 05:30:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-19 05:30:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 89 states have (on average 1.101123595505618) internal successors, (98), 92 states have internal predecessors, (98), 33 states have call successors, (33), 21 states have call predecessors, (33), 20 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 05:30:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 161 transitions. [2022-03-19 05:30:24,160 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 161 transitions. Word has length 105 [2022-03-19 05:30:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:30:24,160 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 161 transitions. [2022-03-19 05:30:24,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 05:30:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 161 transitions. [2022-03-19 05:30:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 05:30:24,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:30:24,165 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:30:24,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 05:30:24,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 05:30:24,375 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:30:24,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:30:24,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1328912794, now seen corresponding path program 1 times [2022-03-19 05:30:24,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:24,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1543058206] [2022-03-19 05:30:24,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:30:24,378 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:30:24,379 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:30:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1328912794, now seen corresponding path program 2 times [2022-03-19 05:30:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:30:24,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124528937] [2022-03-19 05:30:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:30:24,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:30:24,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:30:24,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279502065] [2022-03-19 05:30:24,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:30:24,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:24,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:30:24,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:30:24,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 05:30:24,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:30:24,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:30:24,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 05:30:24,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:30:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-19 05:30:24,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:30:24,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:30:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124528937] [2022-03-19 05:30:24,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:30:24,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279502065] [2022-03-19 05:30:24,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279502065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:30:24,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:30:24,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:30:24,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:30:24,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1543058206] [2022-03-19 05:30:24,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1543058206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:30:24,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:30:24,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:30:24,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737816305] [2022-03-19 05:30:24,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:30:24,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:30:24,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:30:24,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:30:24,690 INFO L87 Difference]: Start difference. First operand 143 states and 161 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:30:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:30:24,759 INFO L93 Difference]: Finished difference Result 195 states and 230 transitions. [2022-03-19 05:30:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 05:30:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 105 [2022-03-19 05:30:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:30:24,761 INFO L225 Difference]: With dead ends: 195 [2022-03-19 05:30:24,761 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 05:30:24,761 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 05:30:24,762 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 8 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:30:24,762 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 193 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:30:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 05:30:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2022-03-19 05:30:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 05:30:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2022-03-19 05:30:24,773 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 105 [2022-03-19 05:30:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:30:24,773 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2022-03-19 05:30:24,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:30:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2022-03-19 05:30:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 05:30:24,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:30:24,775 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:30:24,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 05:30:24,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 05:30:24,980 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:30:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:30:24,980 INFO L85 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 5 times [2022-03-19 05:30:24,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:24,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350582210] [2022-03-19 05:30:24,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:30:24,982 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:30:24,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:30:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 6 times [2022-03-19 05:30:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:30:24,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261450950] [2022-03-19 05:30:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:30:24,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:30:24,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:30:24,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735568717] [2022-03-19 05:30:24,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:30:24,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:24,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:30:24,991 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:30:25,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 05:30:25,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 05:30:25,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:30:25,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 05:30:25,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:30:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 05:30:25,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:30:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2022-03-19 05:30:25,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:30:25,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261450950] [2022-03-19 05:30:25,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:30:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735568717] [2022-03-19 05:30:25,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735568717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:30:25,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:30:25,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-03-19 05:30:25,668 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:30:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350582210] [2022-03-19 05:30:25,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350582210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:30:25,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:30:25,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:30:25,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807666175] [2022-03-19 05:30:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:30:25,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:30:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:30:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:30:25,671 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-19 05:30:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:30:25,741 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-03-19 05:30:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 05:30:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 109 [2022-03-19 05:30:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:30:25,743 INFO L225 Difference]: With dead ends: 128 [2022-03-19 05:30:25,743 INFO L226 Difference]: Without dead ends: 120 [2022-03-19 05:30:25,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:30:25,744 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 17 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:30:25,744 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 132 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:30:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-19 05:30:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-03-19 05:30:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 75 states have internal predecessors, (81), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 05:30:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2022-03-19 05:30:25,759 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 109 [2022-03-19 05:30:25,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:30:25,760 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2022-03-19 05:30:25,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-19 05:30:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2022-03-19 05:30:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 05:30:25,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:30:25,761 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:30:25,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 05:30:25,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 05:30:25,974 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:30:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:30:25,975 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 13 times [2022-03-19 05:30:25,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:25,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1418691654] [2022-03-19 05:30:25,977 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:30:25,977 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:30:25,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:30:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 14 times [2022-03-19 05:30:25,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:30:25,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459935073] [2022-03-19 05:30:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:30:25,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:30:25,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:30:25,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935132828] [2022-03-19 05:30:25,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:30:25,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:25,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:30:25,989 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:30:25,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 05:30:26,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:30:26,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:30:26,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 05:30:26,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:30:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 05:30:26,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:30:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 34 refuted. 5 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 05:30:53,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:30:53,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459935073] [2022-03-19 05:30:53,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:30:53,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935132828] [2022-03-19 05:30:53,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935132828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:30:53,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:30:53,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-03-19 05:30:53,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:30:53,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1418691654] [2022-03-19 05:30:53,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1418691654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:30:53,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:30:53,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:30:53,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511215894] [2022-03-19 05:30:53,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:30:53,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:30:53,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:53,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:30:53,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=227, Unknown=3, NotChecked=0, Total=306 [2022-03-19 05:30:53,060 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 05:30:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:30:53,290 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2022-03-19 05:30:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 05:30:53,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 111 [2022-03-19 05:30:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:30:53,291 INFO L225 Difference]: With dead ends: 180 [2022-03-19 05:30:53,291 INFO L226 Difference]: Without dead ends: 178 [2022-03-19 05:30:53,291 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 202 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=80, Invalid=259, Unknown=3, NotChecked=0, Total=342 [2022-03-19 05:30:53,292 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:30:53,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 501 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:30:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-19 05:30:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2022-03-19 05:30:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 111 states have internal predecessors, (120), 42 states have call successors, (42), 24 states have call predecessors, (42), 23 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 05:30:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2022-03-19 05:30:53,312 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 111 [2022-03-19 05:30:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:30:53,312 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2022-03-19 05:30:53,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 05:30:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2022-03-19 05:30:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 05:30:53,313 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:30:53,314 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:30:53,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 05:30:53,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:53,528 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:30:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:30:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash -238794489, now seen corresponding path program 15 times [2022-03-19 05:30:53,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:30:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637343681] [2022-03-19 05:30:53,531 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:30:53,531 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:30:53,531 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:30:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash -238794489, now seen corresponding path program 16 times [2022-03-19 05:30:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:30:53,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825201573] [2022-03-19 05:30:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:30:53,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:30:53,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:30:53,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4075450] [2022-03-19 05:30:53,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:30:53,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:30:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:30:53,541 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:30:53,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 05:30:53,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:30:53,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:30:53,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 05:30:53,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:30:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 05:30:54,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:31:30,046 WARN L232 SmtUtils]: Spent 7.64s on a formula simplification that was a NOOP. DAG size: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:33:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 05:33:02,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:33:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825201573] [2022-03-19 05:33:02,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:33:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4075450] [2022-03-19 05:33:02,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4075450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:33:02,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:33:02,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-03-19 05:33:02,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:33:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637343681] [2022-03-19 05:33:02,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637343681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:33:02,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:33:02,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 05:33:02,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646965941] [2022-03-19 05:33:02,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:33:02,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 05:33:02,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:33:02,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 05:33:02,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=347, Unknown=1, NotChecked=0, Total=462 [2022-03-19 05:33:02,208 INFO L87 Difference]: Start difference. First operand 175 states and 202 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 05:33:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:33:02,649 INFO L93 Difference]: Finished difference Result 219 states and 257 transitions. [2022-03-19 05:33:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 05:33:02,649 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2022-03-19 05:33:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:33:02,650 INFO L225 Difference]: With dead ends: 219 [2022-03-19 05:33:02,651 INFO L226 Difference]: Without dead ends: 187 [2022-03-19 05:33:02,651 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=118, Invalid=387, Unknown=1, NotChecked=0, Total=506 [2022-03-19 05:33:02,652 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 05:33:02,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 665 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 05:33:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-19 05:33:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-03-19 05:33:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 118 states have internal predecessors, (127), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 05:33:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2022-03-19 05:33:02,685 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 124 [2022-03-19 05:33:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:33:02,685 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2022-03-19 05:33:02,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 05:33:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2022-03-19 05:33:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 05:33:02,686 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:33:02,687 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:33:02,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 05:33:02,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 05:33:02,899 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:33:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:33:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1927738231, now seen corresponding path program 1 times [2022-03-19 05:33:02,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:33:02,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355277191] [2022-03-19 05:33:02,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:33:02,902 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:33:02,902 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:33:02,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1927738231, now seen corresponding path program 2 times [2022-03-19 05:33:02,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:33:02,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120452656] [2022-03-19 05:33:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:33:02,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:33:02,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:33:02,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847379980] [2022-03-19 05:33:02,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:33:02,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:33:02,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:33:02,909 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:33:02,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 05:33:02,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:33:02,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:33:02,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 05:33:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:33:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 05:33:03,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:33:36,230 WARN L232 SmtUtils]: Spent 9.56s on a formula simplification that was a NOOP. DAG size: 437 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:35:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 05:35:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:35:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120452656] [2022-03-19 05:35:01,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:35:01,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847379980] [2022-03-19 05:35:01,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847379980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:35:01,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:35:01,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 05:35:01,891 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:35:01,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355277191] [2022-03-19 05:35:01,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355277191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:35:01,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:35:01,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 05:35:01,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557069573] [2022-03-19 05:35:01,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:35:01,892 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 05:35:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:35:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 05:35:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-03-19 05:35:01,893 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 05:35:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:35:02,204 INFO L93 Difference]: Finished difference Result 237 states and 276 transitions. [2022-03-19 05:35:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:35:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2022-03-19 05:35:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:35:02,205 INFO L225 Difference]: With dead ends: 237 [2022-03-19 05:35:02,205 INFO L226 Difference]: Without dead ends: 197 [2022-03-19 05:35:02,206 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-03-19 05:35:02,206 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 05:35:02,206 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 658 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 05:35:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-19 05:35:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2022-03-19 05:35:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 118 states have internal predecessors, (127), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 05:35:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2022-03-19 05:35:02,228 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 124 [2022-03-19 05:35:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:35:02,228 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2022-03-19 05:35:02,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 05:35:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2022-03-19 05:35:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 05:35:02,230 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:35:02,230 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:35:02,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 05:35:02,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:35:02,435 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:35:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:35:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash -964214553, now seen corresponding path program 17 times [2022-03-19 05:35:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:35:02,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773607806] [2022-03-19 05:35:02,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:35:02,438 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:35:02,438 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:35:02,438 INFO L85 PathProgramCache]: Analyzing trace with hash -964214553, now seen corresponding path program 18 times [2022-03-19 05:35:02,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:35:02,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866647524] [2022-03-19 05:35:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:35:02,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:35:02,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:35:02,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240232593] [2022-03-19 05:35:02,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:35:02,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:35:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:35:02,447 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:35:02,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 05:35:02,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 05:35:02,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:35:02,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 05:35:02,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:35:03,149 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 05:35:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 199 proven. 27 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-19 05:35:03,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:35:33,219 WARN L232 SmtUtils]: Spent 15.40s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:36:09,202 WARN L232 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:37:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 168 proven. 16 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2022-03-19 05:37:23,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:37:23,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866647524] [2022-03-19 05:37:23,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:37:23,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240232593] [2022-03-19 05:37:23,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240232593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:37:23,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:37:23,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2022-03-19 05:37:23,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:37:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1773607806] [2022-03-19 05:37:23,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1773607806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:37:23,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:37:23,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 05:37:23,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043897985] [2022-03-19 05:37:23,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:37:23,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 05:37:23,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:37:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 05:37:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=287, Unknown=3, NotChecked=0, Total=380 [2022-03-19 05:37:23,187 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:37:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:37:23,896 INFO L93 Difference]: Finished difference Result 207 states and 234 transitions. [2022-03-19 05:37:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 05:37:23,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 128 [2022-03-19 05:37:23,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:37:23,898 INFO L225 Difference]: With dead ends: 207 [2022-03-19 05:37:23,898 INFO L226 Difference]: Without dead ends: 205 [2022-03-19 05:37:23,898 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 232 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=103, Invalid=356, Unknown=3, NotChecked=0, Total=462 [2022-03-19 05:37:23,899 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 05:37:23,899 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 361 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 05:37:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-19 05:37:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2022-03-19 05:37:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 124 states have internal predecessors, (133), 42 states have call successors, (42), 28 states have call predecessors, (42), 27 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 05:37:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 215 transitions. [2022-03-19 05:37:23,926 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 215 transitions. Word has length 128 [2022-03-19 05:37:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:37:23,928 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 215 transitions. [2022-03-19 05:37:23,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:37:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 215 transitions. [2022-03-19 05:37:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 05:37:23,931 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:37:23,931 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:37:23,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 05:37:24,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:37:24,156 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:37:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:37:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1349759516, now seen corresponding path program 7 times [2022-03-19 05:37:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:37:24,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [536016358] [2022-03-19 05:37:24,158 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:37:24,158 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:37:24,159 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:37:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1349759516, now seen corresponding path program 8 times [2022-03-19 05:37:24,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:37:24,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986139976] [2022-03-19 05:37:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:37:24,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:37:24,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:37:24,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407011177] [2022-03-19 05:37:24,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:37:24,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:37:24,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:37:24,172 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:37:24,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 05:37:24,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:37:24,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:37:24,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 05:37:24,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:37:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 05:37:24,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:37:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 05:37:38,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:37:38,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986139976] [2022-03-19 05:37:38,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:37:38,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407011177] [2022-03-19 05:37:38,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407011177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:37:38,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:37:38,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2022-03-19 05:37:38,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:37:38,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [536016358] [2022-03-19 05:37:38,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [536016358] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:37:38,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:37:38,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 05:37:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352618977] [2022-03-19 05:37:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:37:38,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 05:37:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:37:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 05:37:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-19 05:37:38,620 INFO L87 Difference]: Start difference. First operand 192 states and 215 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 05:37:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:37:38,893 INFO L93 Difference]: Finished difference Result 230 states and 263 transitions. [2022-03-19 05:37:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 05:37:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 135 [2022-03-19 05:37:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:37:38,894 INFO L225 Difference]: With dead ends: 230 [2022-03-19 05:37:38,894 INFO L226 Difference]: Without dead ends: 204 [2022-03-19 05:37:38,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 245 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-03-19 05:37:38,895 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 9 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:37:38,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 638 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:37:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-19 05:37:38,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-03-19 05:37:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 131 states have internal predecessors, (140), 45 states have call successors, (45), 29 states have call predecessors, (45), 28 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 05:37:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 228 transitions. [2022-03-19 05:37:38,924 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 228 transitions. Word has length 135 [2022-03-19 05:37:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:37:38,925 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 228 transitions. [2022-03-19 05:37:38,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 05:37:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 228 transitions. [2022-03-19 05:37:38,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 05:37:38,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:37:38,926 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:37:38,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 05:37:39,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:37:39,150 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:37:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:37:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1372391770, now seen corresponding path program 3 times [2022-03-19 05:37:39,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:37:39,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971736314] [2022-03-19 05:37:39,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:37:39,153 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:37:39,153 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:37:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1372391770, now seen corresponding path program 4 times [2022-03-19 05:37:39,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:37:39,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304091280] [2022-03-19 05:37:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:37:39,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:37:39,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:37:39,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55169221] [2022-03-19 05:37:39,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:37:39,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:37:39,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:37:39,174 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:37:39,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 05:37:39,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:37:39,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:37:39,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 05:37:39,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:37:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 05:37:39,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:37:40,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:37:40,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304091280] [2022-03-19 05:37:40,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:37:40,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55169221] [2022-03-19 05:37:40,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55169221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 05:37:40,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:37:40,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 05:37:40,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:37:40,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971736314] [2022-03-19 05:37:40,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971736314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:37:40,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:37:40,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 05:37:40,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439505608] [2022-03-19 05:37:40,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:37:40,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 05:37:40,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:37:40,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 05:37:40,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-19 05:37:40,486 INFO L87 Difference]: Start difference. First operand 203 states and 228 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 05:37:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:37:40,928 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2022-03-19 05:37:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:37:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 135 [2022-03-19 05:37:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:37:40,932 INFO L225 Difference]: With dead ends: 239 [2022-03-19 05:37:40,932 INFO L226 Difference]: Without dead ends: 213 [2022-03-19 05:37:40,933 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-03-19 05:37:40,933 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 9 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 05:37:40,934 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 574 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 05:37:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-19 05:37:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 201. [2022-03-19 05:37:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 130 states have internal predecessors, (138), 45 states have call successors, (45), 29 states have call predecessors, (45), 28 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 05:37:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 226 transitions. [2022-03-19 05:37:40,962 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 226 transitions. Word has length 135 [2022-03-19 05:37:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:37:40,963 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 226 transitions. [2022-03-19 05:37:40,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 05:37:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 226 transitions. [2022-03-19 05:37:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-19 05:37:40,964 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:37:40,964 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:37:40,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 05:37:41,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:37:41,186 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:37:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:37:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash 66667591, now seen corresponding path program 1 times [2022-03-19 05:37:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:37:41,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1153638859] [2022-03-19 05:37:41,189 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:37:41,189 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:37:41,189 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:37:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash 66667591, now seen corresponding path program 2 times [2022-03-19 05:37:41,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:37:41,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955627164] [2022-03-19 05:37:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:37:41,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:37:41,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:37:41,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932737735] [2022-03-19 05:37:41,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:37:41,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:37:41,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:37:41,198 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:37:41,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 05:37:41,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:37:41,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:37:41,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 05:37:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:37:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 05:37:41,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:37:43,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:37:43,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955627164] [2022-03-19 05:37:43,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:37:43,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932737735] [2022-03-19 05:37:43,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932737735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 05:37:43,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:37:43,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 05:37:43,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:37:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1153638859] [2022-03-19 05:37:43,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1153638859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:37:43,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:37:43,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 05:37:43,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708296283] [2022-03-19 05:37:43,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:37:43,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 05:37:43,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:37:43,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 05:37:43,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-19 05:37:43,672 INFO L87 Difference]: Start difference. First operand 201 states and 226 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 05:37:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:37:44,003 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2022-03-19 05:37:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:37:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 140 [2022-03-19 05:37:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:37:44,004 INFO L225 Difference]: With dead ends: 208 [2022-03-19 05:37:44,004 INFO L226 Difference]: Without dead ends: 154 [2022-03-19 05:37:44,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-19 05:37:44,005 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 16 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:37:44,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 613 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:37:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-19 05:37:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-03-19 05:37:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 97 states have (on average 1.092783505154639) internal successors, (106), 98 states have internal predecessors, (106), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 05:37:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2022-03-19 05:37:44,021 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 140 [2022-03-19 05:37:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:37:44,021 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2022-03-19 05:37:44,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 05:37:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2022-03-19 05:37:44,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 05:37:44,022 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:37:44,023 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:37:44,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 05:37:44,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-19 05:37:44,226 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:37:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:37:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1044299320, now seen corresponding path program 19 times [2022-03-19 05:37:44,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:37:44,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [292823356] [2022-03-19 05:37:44,229 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:37:44,229 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:37:44,229 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:37:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1044299320, now seen corresponding path program 20 times [2022-03-19 05:37:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:37:44,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871770409] [2022-03-19 05:37:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:37:44,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:37:44,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:37:44,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295949476] [2022-03-19 05:37:44,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:37:44,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:37:44,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:37:44,237 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:37:44,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 05:37:44,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:37:44,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:37:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 05:37:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:37:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 05:37:44,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:38:24,793 WARN L232 SmtUtils]: Spent 9.23s on a formula simplification that was a NOOP. DAG size: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:40:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 05:40:18,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:40:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871770409] [2022-03-19 05:40:18,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:40:18,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295949476] [2022-03-19 05:40:18,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295949476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:40:18,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:40:18,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 05:40:18,490 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:40:18,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [292823356] [2022-03-19 05:40:18,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [292823356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:40:18,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:40:18,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 05:40:18,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721596639] [2022-03-19 05:40:18,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:40:18,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 05:40:18,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:40:18,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 05:40:18,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=412, Unknown=4, NotChecked=0, Total=552 [2022-03-19 05:40:18,491 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 05:40:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:40:19,015 INFO L93 Difference]: Finished difference Result 233 states and 265 transitions. [2022-03-19 05:40:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:40:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 141 [2022-03-19 05:40:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:40:19,018 INFO L225 Difference]: With dead ends: 233 [2022-03-19 05:40:19,018 INFO L226 Difference]: Without dead ends: 225 [2022-03-19 05:40:19,019 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 256 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=140, Invalid=456, Unknown=4, NotChecked=0, Total=600 [2022-03-19 05:40:19,019 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 05:40:19,019 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 747 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 05:40:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-19 05:40:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2022-03-19 05:40:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 134 states have (on average 1.0895522388059702) internal successors, (146), 137 states have internal predecessors, (146), 47 states have call successors, (47), 31 states have call predecessors, (47), 30 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-19 05:40:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2022-03-19 05:40:19,047 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 141 [2022-03-19 05:40:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:40:19,048 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2022-03-19 05:40:19,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 05:40:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2022-03-19 05:40:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 05:40:19,049 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:40:19,049 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:40:19,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 05:40:19,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-19 05:40:19,265 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:40:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:40:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -644644422, now seen corresponding path program 3 times [2022-03-19 05:40:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:40:19,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040720842] [2022-03-19 05:40:19,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:40:19,268 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:40:19,268 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:40:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash -644644422, now seen corresponding path program 4 times [2022-03-19 05:40:19,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:40:19,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276856332] [2022-03-19 05:40:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:40:19,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:40:19,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:40:19,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551392552] [2022-03-19 05:40:19,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:40:19,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:40:19,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:40:19,275 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:40:19,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 05:40:19,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:40:19,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:40:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 05:40:19,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:40:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 05:40:19,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:40:50,222 WARN L232 SmtUtils]: Spent 9.57s on a formula simplification that was a NOOP. DAG size: 429 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:42:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 05:42:21,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:42:21,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276856332] [2022-03-19 05:42:21,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:42:21,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551392552] [2022-03-19 05:42:21,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551392552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:42:21,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:42:21,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-03-19 05:42:21,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:42:21,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040720842] [2022-03-19 05:42:21,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040720842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:42:21,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:42:21,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 05:42:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500180727] [2022-03-19 05:42:21,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:42:21,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 05:42:21,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:42:21,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 05:42:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-19 05:42:21,216 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 05:42:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:42:21,640 INFO L93 Difference]: Finished difference Result 245 states and 278 transitions. [2022-03-19 05:42:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 05:42:21,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 141 [2022-03-19 05:42:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:42:21,642 INFO L225 Difference]: With dead ends: 245 [2022-03-19 05:42:21,642 INFO L226 Difference]: Without dead ends: 237 [2022-03-19 05:42:21,642 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 258 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-03-19 05:42:21,643 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 10 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 05:42:21,643 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 680 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 05:42:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-19 05:42:21,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 225. [2022-03-19 05:42:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 146 states have internal predecessors, (156), 49 states have call successors, (49), 33 states have call predecessors, (49), 32 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-19 05:42:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 252 transitions. [2022-03-19 05:42:21,673 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 252 transitions. Word has length 141 [2022-03-19 05:42:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:42:21,673 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 252 transitions. [2022-03-19 05:42:21,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 05:42:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 252 transitions. [2022-03-19 05:42:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-19 05:42:21,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:42:21,675 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:42:21,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 05:42:21,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:42:21,899 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:42:21,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:42:21,899 INFO L85 PathProgramCache]: Analyzing trace with hash -45169589, now seen corresponding path program 9 times [2022-03-19 05:42:21,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:42:21,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1898785855] [2022-03-19 05:42:21,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:42:21,901 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:42:21,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:42:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash -45169589, now seen corresponding path program 10 times [2022-03-19 05:42:21,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:42:21,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019811894] [2022-03-19 05:42:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:42:21,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:42:21,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:42:21,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190783999] [2022-03-19 05:42:21,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:42:21,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:42:21,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:42:21,923 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:42:21,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 05:42:21,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:42:21,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:42:21,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 05:42:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:42:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 96 proven. 27 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-19 05:42:22,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:42:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 96 proven. 27 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-19 05:42:23,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:42:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019811894] [2022-03-19 05:42:23,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:42:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190783999] [2022-03-19 05:42:23,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190783999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:42:23,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:42:23,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-19 05:42:23,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:42:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1898785855] [2022-03-19 05:42:23,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1898785855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:42:23,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:42:23,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 05:42:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137779446] [2022-03-19 05:42:23,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:42:23,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 05:42:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:42:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 05:42:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-19 05:42:23,136 INFO L87 Difference]: Start difference. First operand 225 states and 252 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2022-03-19 05:42:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:42:23,269 INFO L93 Difference]: Finished difference Result 249 states and 287 transitions. [2022-03-19 05:42:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:42:23,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) Word has length 152 [2022-03-19 05:42:23,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:42:23,271 INFO L225 Difference]: With dead ends: 249 [2022-03-19 05:42:23,271 INFO L226 Difference]: Without dead ends: 241 [2022-03-19 05:42:23,272 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 288 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-19 05:42:23,272 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 15 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:42:23,274 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 185 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:42:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-19 05:42:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2022-03-19 05:42:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 151 states have (on average 1.099337748344371) internal successors, (166), 154 states have internal predecessors, (166), 55 states have call successors, (55), 33 states have call predecessors, (55), 32 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-19 05:42:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 274 transitions. [2022-03-19 05:42:23,306 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 274 transitions. Word has length 152 [2022-03-19 05:42:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:42:23,306 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 274 transitions. [2022-03-19 05:42:23,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2022-03-19 05:42:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 274 transitions. [2022-03-19 05:42:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 05:42:23,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:42:23,308 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:42:23,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-19 05:42:23,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:42:23,524 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:42:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:42:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash 176630919, now seen corresponding path program 21 times [2022-03-19 05:42:23,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:42:23,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1374445252] [2022-03-19 05:42:23,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:42:23,527 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:42:23,527 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:42:23,527 INFO L85 PathProgramCache]: Analyzing trace with hash 176630919, now seen corresponding path program 22 times [2022-03-19 05:42:23,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:42:23,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690466566] [2022-03-19 05:42:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:42:23,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:42:23,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:42:23,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294446427] [2022-03-19 05:42:23,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:42:23,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:42:23,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:42:23,537 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:42:23,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 05:42:23,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:42:23,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:42:23,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 05:42:23,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:42:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-19 05:42:24,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:43:03,544 WARN L232 SmtUtils]: Spent 9.86s on a formula simplification that was a NOOP. DAG size: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)