/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 02:43:21,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 02:43:21,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 02:43:21,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 02:43:21,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 02:43:21,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 02:43:21,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 02:43:21,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 02:43:21,720 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 02:43:21,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 02:43:21,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 02:43:21,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 02:43:21,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 02:43:21,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 02:43:21,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 02:43:21,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 02:43:21,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 02:43:21,723 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 02:43:21,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 02:43:21,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 02:43:21,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 02:43:21,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 02:43:21,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 02:43:21,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:43:21,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 02:43:21,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 02:43:21,724 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 02:43:21,724 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 02:43:21,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 02:43:21,725 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 02:43:21,725 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 02:43:21,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 02:43:21,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 02:43:21,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 02:43:21,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 02:43:21,972 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 02:43:21,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2022-03-18 02:43:22,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fde4b8a0/9dce393a4d0e4e488580a7b0c24de1eb/FLAG43458eb25 [2022-03-18 02:43:22,376 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 02:43:22,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2022-03-18 02:43:22,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fde4b8a0/9dce393a4d0e4e488580a7b0c24de1eb/FLAG43458eb25 [2022-03-18 02:43:22,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fde4b8a0/9dce393a4d0e4e488580a7b0c24de1eb [2022-03-18 02:43:22,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 02:43:22,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 02:43:22,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 02:43:22,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 02:43:22,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 02:43:22,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e7f2968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22, skipping insertion in model container [2022-03-18 02:43:22,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 02:43:22,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 02:43:22,543 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/egcd3-ll_unwindbound10.c[490,503] [2022-03-18 02:43:22,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:43:22,584 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 02:43:22,598 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/egcd3-ll_unwindbound10.c[490,503] [2022-03-18 02:43:22,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:43:22,615 INFO L208 MainTranslator]: Completed translation [2022-03-18 02:43:22,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22 WrapperNode [2022-03-18 02:43:22,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 02:43:22,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 02:43:22,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 02:43:22,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 02:43:22,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 02:43:22,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 02:43:22,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 02:43:22,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 02:43:22,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22" (1/1) ... [2022-03-18 02:43:22,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:43:22,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:22,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 02:43:22,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 02:43:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 02:43:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 02:43:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 02:43:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 02:43:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 02:43:22,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 02:43:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 02:43:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 02:43:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 02:43:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 02:43:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 02:43:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 02:43:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 02:43:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 02:43:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 02:43:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 02:43:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 02:43:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 02:43:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 02:43:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 02:43:22,760 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 02:43:22,761 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 02:43:22,900 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 02:43:22,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 02:43:22,904 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 02:43:22,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:43:22 BoogieIcfgContainer [2022-03-18 02:43:22,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 02:43:22,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 02:43:22,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 02:43:22,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 02:43:22,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:43:22" (1/3) ... [2022-03-18 02:43:22,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8fd19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:43:22, skipping insertion in model container [2022-03-18 02:43:22,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:22" (2/3) ... [2022-03-18 02:43:22,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8fd19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:43:22, skipping insertion in model container [2022-03-18 02:43:22,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:43:22" (3/3) ... [2022-03-18 02:43:22,935 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2022-03-18 02:43:22,939 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 02:43:22,939 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 02:43:22,972 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 02:43:22,977 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 02:43:22,977 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 02:43:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 02:43:22,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 02:43:22,995 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:22,995 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:22,996 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:22,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:22,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2022-03-18 02:43:23,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:23,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381653095] [2022-03-18 02:43:23,013 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 2 times [2022-03-18 02:43:23,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:23,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814116354] [2022-03-18 02:43:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:23,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:43:23,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:43:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:43:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:43:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:43:23,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 02:43:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:43:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:23,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:23,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814116354] [2022-03-18 02:43:23,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814116354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:23,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:23,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:43:23,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:23,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381653095] [2022-03-18 02:43:23,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381653095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:23,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:23,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:43:23,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853494197] [2022-03-18 02:43:23,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:23,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:43:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:23,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:43:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:43:23,232 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:23,355 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-03-18 02:43:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:43:23,357 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 02:43:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:23,364 INFO L225 Difference]: With dead ends: 74 [2022-03-18 02:43:23,365 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 02:43:23,368 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:43:23,372 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:23,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 02:43:23,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-18 02:43:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 02:43:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-18 02:43:23,424 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-18 02:43:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:23,424 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-18 02:43:23,425 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-18 02:43:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 02:43:23,430 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:23,431 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:23,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 02:43:23,431 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2022-03-18 02:43:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:23,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [551695320] [2022-03-18 02:43:23,439 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 2 times [2022-03-18 02:43:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:23,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610266004] [2022-03-18 02:43:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:23,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:23,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:23,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382046636] [2022-03-18 02:43:23,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:23,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:23,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:23,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:43:23,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 02:43:23,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:43:23,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:23,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:43:23,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:23,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:43:23,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:23,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610266004] [2022-03-18 02:43:23,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:23,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382046636] [2022-03-18 02:43:23,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382046636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:23,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:23,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 02:43:23,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:23,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [551695320] [2022-03-18 02:43:23,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [551695320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:23,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:23,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 02:43:23,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952655797] [2022-03-18 02:43:23,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:23,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 02:43:23,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 02:43:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 02:43:23,703 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:23,718 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-03-18 02:43:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 02:43:23,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 02:43:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:23,722 INFO L225 Difference]: With dead ends: 44 [2022-03-18 02:43:23,722 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 02:43:23,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 02:43:23,723 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:23,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 02:43:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-18 02:43:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 02:43:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-18 02:43:23,732 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-18 02:43:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:23,733 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-18 02:43:23,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-18 02:43:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 02:43:23,734 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:23,734 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:23,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:23,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:23,935 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2022-03-18 02:43:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:23,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [764475462] [2022-03-18 02:43:23,937 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:23,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 2 times [2022-03-18 02:43:23,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:23,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788989515] [2022-03-18 02:43:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:23,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:23,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738919919] [2022-03-18 02:43:23,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:23,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:23,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:23,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:43:23,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 02:43:24,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:43:24,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:43:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:24,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:43:24,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:24,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788989515] [2022-03-18 02:43:24,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:24,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738919919] [2022-03-18 02:43:24,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738919919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:24,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:24,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:43:24,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:24,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [764475462] [2022-03-18 02:43:24,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [764475462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:24,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:24,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:43:24,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535139073] [2022-03-18 02:43:24,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:24,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:43:24,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:43:24,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:43:24,180 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 02:43:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:24,289 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-03-18 02:43:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:43:24,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-18 02:43:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:24,292 INFO L225 Difference]: With dead ends: 57 [2022-03-18 02:43:24,292 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 02:43:24,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:43:24,294 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:24,294 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 192 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 02:43:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-18 02:43:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:43:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-03-18 02:43:24,311 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 24 [2022-03-18 02:43:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:24,311 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-03-18 02:43:24,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 02:43:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-03-18 02:43:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 02:43:24,312 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:24,313 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-18 02:43:24,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:24,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 02:43:24,536 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2022-03-18 02:43:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:24,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1531656051] [2022-03-18 02:43:24,538 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:24,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 2 times [2022-03-18 02:43:24,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:24,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584686076] [2022-03-18 02:43:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:24,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:24,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:24,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265062999] [2022-03-18 02:43:24,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:24,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:24,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:24,554 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) [2022-03-18 02:43:24,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 02:43:24,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:24,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:24,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:43:24,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:24,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:43:24,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584686076] [2022-03-18 02:43:24,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265062999] [2022-03-18 02:43:24,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265062999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:24,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:24,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:24,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1531656051] [2022-03-18 02:43:24,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1531656051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:24,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:24,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:24,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840948779] [2022-03-18 02:43:24,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:24,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:43:24,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:24,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:43:24,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:43:24,681 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:24,707 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2022-03-18 02:43:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:43:24,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-18 02:43:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:24,709 INFO L225 Difference]: With dead ends: 77 [2022-03-18 02:43:24,709 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 02:43:24,710 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:43:24,711 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:24,711 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:24,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 02:43:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 02:43:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:43:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-18 02:43:24,722 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-18 02:43:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:24,722 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-18 02:43:24,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-18 02:43:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 02:43:24,723 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:24,723 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:24,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:24,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:24,947 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2022-03-18 02:43:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:24,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [778974647] [2022-03-18 02:43:24,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:24,948 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 2 times [2022-03-18 02:43:24,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:24,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793433615] [2022-03-18 02:43:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:24,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:24,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:24,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909718326] [2022-03-18 02:43:24,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:24,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:24,968 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) [2022-03-18 02:43:24,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 02:43:25,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:25,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:25,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:43:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:25,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:25,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:25,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793433615] [2022-03-18 02:43:25,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:25,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909718326] [2022-03-18 02:43:25,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909718326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:25,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:25,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 02:43:25,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:25,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [778974647] [2022-03-18 02:43:25,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [778974647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:25,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:25,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:43:25,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717356862] [2022-03-18 02:43:25,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:25,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:43:25,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:43:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 02:43:25,217 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:25,253 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-03-18 02:43:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 02:43:25,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-03-18 02:43:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:25,256 INFO L225 Difference]: With dead ends: 67 [2022-03-18 02:43:25,256 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 02:43:25,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:43:25,260 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:25,261 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 02:43:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-18 02:43:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:43:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2022-03-18 02:43:25,282 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2022-03-18 02:43:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:25,282 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2022-03-18 02:43:25,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2022-03-18 02:43:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 02:43:25,284 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:25,284 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-18 02:43:25,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:25,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:25,499 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:25,500 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2022-03-18 02:43:25,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:25,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373231369] [2022-03-18 02:43:25,501 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 2 times [2022-03-18 02:43:25,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:25,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290163029] [2022-03-18 02:43:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:25,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:25,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:25,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348838843] [2022-03-18 02:43:25,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:25,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:25,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:25,515 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) [2022-03-18 02:43:25,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 02:43:25,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:25,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:25,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:43:25,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 02:43:25,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 02:43:25,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:25,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290163029] [2022-03-18 02:43:25,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:25,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348838843] [2022-03-18 02:43:25,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348838843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:25,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:25,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:43:25,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:25,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373231369] [2022-03-18 02:43:25,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373231369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:25,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:25,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:43:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344896303] [2022-03-18 02:43:25,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:25,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:43:25,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:43:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:43:25,779 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:25,976 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-03-18 02:43:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:43:25,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-18 02:43:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:25,978 INFO L225 Difference]: With dead ends: 138 [2022-03-18 02:43:25,978 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 02:43:25,978 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:43:25,979 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 115 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:25,979 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 353 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 02:43:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2022-03-18 02:43:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 02:43:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2022-03-18 02:43:25,995 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2022-03-18 02:43:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:25,995 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2022-03-18 02:43:25,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2022-03-18 02:43:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 02:43:25,996 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:25,996 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:26,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:26,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:26,220 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2022-03-18 02:43:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1746357794] [2022-03-18 02:43:26,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:26,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 2 times [2022-03-18 02:43:26,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:26,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919655662] [2022-03-18 02:43:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:26,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:26,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902614699] [2022-03-18 02:43:26,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:26,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:26,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:26,246 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) [2022-03-18 02:43:26,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 02:43:26,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:26,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:26,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:43:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:26,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:43:26,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:26,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919655662] [2022-03-18 02:43:26,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:26,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902614699] [2022-03-18 02:43:26,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902614699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:26,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:26,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:43:26,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:26,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1746357794] [2022-03-18 02:43:26,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1746357794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:26,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:26,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:43:26,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826751545] [2022-03-18 02:43:26,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:26,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:43:26,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:26,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:43:26,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:43:26,374 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:26,420 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2022-03-18 02:43:26,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:43:26,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-18 02:43:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:26,422 INFO L225 Difference]: With dead ends: 127 [2022-03-18 02:43:26,422 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 02:43:26,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:43:26,424 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:26,424 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 165 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 02:43:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-18 02:43:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 02:43:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2022-03-18 02:43:26,454 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 35 [2022-03-18 02:43:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:26,454 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2022-03-18 02:43:26,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2022-03-18 02:43:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 02:43:26,457 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:26,457 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-18 02:43:26,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:26,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:26,680 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2022-03-18 02:43:26,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:26,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [507770325] [2022-03-18 02:43:26,681 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 2 times [2022-03-18 02:43:26,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:26,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205836804] [2022-03-18 02:43:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:26,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:26,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768242272] [2022-03-18 02:43:26,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:26,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:26,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:26,695 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) [2022-03-18 02:43:26,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 02:43:26,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:26,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 02:43:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:26,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:26,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:26,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205836804] [2022-03-18 02:43:26,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:26,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768242272] [2022-03-18 02:43:26,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768242272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:26,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:26,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-18 02:43:26,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:26,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [507770325] [2022-03-18 02:43:26,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [507770325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:26,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:26,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:43:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676719846] [2022-03-18 02:43:26,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:26,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:43:26,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:43:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:43:26,952 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:27,015 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2022-03-18 02:43:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:43:27,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-18 02:43:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:27,017 INFO L225 Difference]: With dead ends: 163 [2022-03-18 02:43:27,017 INFO L226 Difference]: Without dead ends: 112 [2022-03-18 02:43:27,019 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:43:27,020 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:27,020 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 163 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-18 02:43:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-18 02:43:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 02:43:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2022-03-18 02:43:27,042 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 36 [2022-03-18 02:43:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:27,043 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2022-03-18 02:43:27,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2022-03-18 02:43:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 02:43:27,049 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:27,049 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-18 02:43:27,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:27,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:27,269 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:27,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:27,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2022-03-18 02:43:27,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:27,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1208870519] [2022-03-18 02:43:27,269 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:27,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 2 times [2022-03-18 02:43:27,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:27,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567217534] [2022-03-18 02:43:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:27,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:27,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:27,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439001137] [2022-03-18 02:43:27,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:27,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:27,285 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) [2022-03-18 02:43:27,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 02:43:27,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 02:43:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 02:43:27,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:27,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567217534] [2022-03-18 02:43:27,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439001137] [2022-03-18 02:43:27,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439001137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:27,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:27,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-18 02:43:27,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:27,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1208870519] [2022-03-18 02:43:27,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1208870519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:27,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:27,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:43:27,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001184006] [2022-03-18 02:43:27,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:27,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:43:27,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:43:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:43:27,662 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:27,766 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-03-18 02:43:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:43:27,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-18 02:43:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:27,767 INFO L225 Difference]: With dead ends: 154 [2022-03-18 02:43:27,767 INFO L226 Difference]: Without dead ends: 152 [2022-03-18 02:43:27,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:43:27,768 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 61 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:27,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 375 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-18 02:43:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-03-18 02:43:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 02:43:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2022-03-18 02:43:27,784 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2022-03-18 02:43:27,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:27,784 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2022-03-18 02:43:27,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2022-03-18 02:43:27,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 02:43:27,785 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:27,785 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-18 02:43:27,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:28,003 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,SelfDestructingSolverStorable8 [2022-03-18 02:43:28,004 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:28,004 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 3 times [2022-03-18 02:43:28,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:28,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [321877073] [2022-03-18 02:43:28,005 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 4 times [2022-03-18 02:43:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:28,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494729011] [2022-03-18 02:43:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:28,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:28,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047133077] [2022-03-18 02:43:28,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:43:28,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:28,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:28,029 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) [2022-03-18 02:43:28,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 02:43:28,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:43:28,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:28,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:43:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:28,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:43:28,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:28,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494729011] [2022-03-18 02:43:28,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:28,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047133077] [2022-03-18 02:43:28,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047133077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:28,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:28,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:28,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:28,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [321877073] [2022-03-18 02:43:28,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [321877073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:28,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:28,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:28,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919901241] [2022-03-18 02:43:28,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:28,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:43:28,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:28,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:43:28,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:43:28,137 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 02:43:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:28,229 INFO L93 Difference]: Finished difference Result 300 states and 442 transitions. [2022-03-18 02:43:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:43:28,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-03-18 02:43:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:28,234 INFO L225 Difference]: With dead ends: 300 [2022-03-18 02:43:28,234 INFO L226 Difference]: Without dead ends: 249 [2022-03-18 02:43:28,235 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:43:28,236 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:28,237 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-18 02:43:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 175. [2022-03-18 02:43:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 137 states have internal predecessors, (183), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 02:43:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 239 transitions. [2022-03-18 02:43:28,280 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 239 transitions. Word has length 37 [2022-03-18 02:43:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:28,280 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 239 transitions. [2022-03-18 02:43:28,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 02:43:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 239 transitions. [2022-03-18 02:43:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 02:43:28,281 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:28,281 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:28,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:28,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 02:43:28,495 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2022-03-18 02:43:28,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:28,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1764151184] [2022-03-18 02:43:28,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 2 times [2022-03-18 02:43:28,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:28,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242774277] [2022-03-18 02:43:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:28,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:28,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:28,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997115299] [2022-03-18 02:43:28,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:28,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:28,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:28,508 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) [2022-03-18 02:43:28,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 02:43:28,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:28,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:28,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 02:43:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 02:43:28,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:43:28,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:28,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242774277] [2022-03-18 02:43:28,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:28,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997115299] [2022-03-18 02:43:28,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997115299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:28,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:28,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:43:28,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1764151184] [2022-03-18 02:43:28,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1764151184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:28,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:28,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:43:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348430081] [2022-03-18 02:43:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:28,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:43:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:43:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:43:28,678 INFO L87 Difference]: Start difference. First operand 175 states and 239 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:43:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:28,803 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2022-03-18 02:43:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:43:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-18 02:43:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:28,807 INFO L225 Difference]: With dead ends: 193 [2022-03-18 02:43:28,807 INFO L226 Difference]: Without dead ends: 191 [2022-03-18 02:43:28,807 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:43:28,808 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:28,808 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 270 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-18 02:43:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-18 02:43:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 146 states have internal predecessors, (194), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 02:43:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 258 transitions. [2022-03-18 02:43:28,832 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 258 transitions. Word has length 39 [2022-03-18 02:43:28,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:28,832 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 258 transitions. [2022-03-18 02:43:28,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:43:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 258 transitions. [2022-03-18 02:43:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 02:43:28,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:28,833 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:28,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:29,055 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,SelfDestructingSolverStorable10 [2022-03-18 02:43:29,055 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2022-03-18 02:43:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:29,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103663059] [2022-03-18 02:43:29,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 2 times [2022-03-18 02:43:29,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:29,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348168772] [2022-03-18 02:43:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:29,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:29,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:29,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834523913] [2022-03-18 02:43:29,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:29,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:29,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:29,067 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) [2022-03-18 02:43:29,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 02:43:29,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:29,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:43:29,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:29,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:29,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348168772] [2022-03-18 02:43:29,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834523913] [2022-03-18 02:43:29,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834523913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:29,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:29,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-18 02:43:29,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103663059] [2022-03-18 02:43:29,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103663059] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:29,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:29,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:43:29,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62184035] [2022-03-18 02:43:29,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:29,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:43:29,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:43:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:29,584 INFO L87 Difference]: Start difference. First operand 190 states and 258 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 02:43:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:29,784 INFO L93 Difference]: Finished difference Result 199 states and 266 transitions. [2022-03-18 02:43:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:43:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-03-18 02:43:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:29,787 INFO L225 Difference]: With dead ends: 199 [2022-03-18 02:43:29,787 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 02:43:29,787 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:43:29,787 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 72 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:29,788 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 385 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 02:43:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-03-18 02:43:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 149 states have internal predecessors, (197), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 02:43:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2022-03-18 02:43:29,828 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 41 [2022-03-18 02:43:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:29,828 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2022-03-18 02:43:29,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 02:43:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2022-03-18 02:43:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 02:43:29,829 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:29,829 INFO L500 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:29,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:30,044 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,SelfDestructingSolverStorable11 [2022-03-18 02:43:30,045 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2022-03-18 02:43:30,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:30,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293314092] [2022-03-18 02:43:30,045 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:30,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 2 times [2022-03-18 02:43:30,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:30,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128820335] [2022-03-18 02:43:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:30,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:30,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:30,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613500112] [2022-03-18 02:43:30,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:30,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:30,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:30,056 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) [2022-03-18 02:43:30,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 02:43:30,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:30,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:43:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 02:43:30,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:43:30,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128820335] [2022-03-18 02:43:30,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613500112] [2022-03-18 02:43:30,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613500112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:30,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:30,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:30,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:30,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293314092] [2022-03-18 02:43:30,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293314092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:30,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:30,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915879241] [2022-03-18 02:43:30,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:30,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:43:30,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:43:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:43:30,190 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:43:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:30,250 INFO L93 Difference]: Finished difference Result 261 states and 367 transitions. [2022-03-18 02:43:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:43:30,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-18 02:43:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:30,254 INFO L225 Difference]: With dead ends: 261 [2022-03-18 02:43:30,255 INFO L226 Difference]: Without dead ends: 259 [2022-03-18 02:43:30,255 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:43:30,256 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:30,256 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 169 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-18 02:43:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 228. [2022-03-18 02:43:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 161 states have (on average 1.329192546583851) internal successors, (214), 167 states have internal predecessors, (214), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 02:43:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 318 transitions. [2022-03-18 02:43:30,289 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 318 transitions. Word has length 44 [2022-03-18 02:43:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:30,289 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 318 transitions. [2022-03-18 02:43:30,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:43:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 318 transitions. [2022-03-18 02:43:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 02:43:30,290 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:30,290 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:30,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:30,511 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,SelfDestructingSolverStorable12 [2022-03-18 02:43:30,511 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:30,512 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2022-03-18 02:43:30,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:30,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [281586256] [2022-03-18 02:43:30,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:30,512 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 2 times [2022-03-18 02:43:30,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:30,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204916561] [2022-03-18 02:43:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:30,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:30,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:30,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160728219] [2022-03-18 02:43:30,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:30,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:30,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:30,522 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) [2022-03-18 02:43:30,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 02:43:30,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:30,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:30,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 02:43:30,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:30,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:43:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204916561] [2022-03-18 02:43:30,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:30,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160728219] [2022-03-18 02:43:30,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160728219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:30,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:30,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 02:43:30,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:30,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [281586256] [2022-03-18 02:43:30,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [281586256] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:30,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:30,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:43:30,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260844461] [2022-03-18 02:43:30,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:30,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:43:30,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:43:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:30,819 INFO L87 Difference]: Start difference. First operand 228 states and 318 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:30,928 INFO L93 Difference]: Finished difference Result 429 states and 607 transitions. [2022-03-18 02:43:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:43:30,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-18 02:43:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:30,934 INFO L225 Difference]: With dead ends: 429 [2022-03-18 02:43:30,934 INFO L226 Difference]: Without dead ends: 264 [2022-03-18 02:43:30,935 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:43:30,935 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:30,936 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 203 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-18 02:43:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-03-18 02:43:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 189 states have internal predecessors, (239), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 02:43:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2022-03-18 02:43:30,969 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 42 [2022-03-18 02:43:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:30,970 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2022-03-18 02:43:30,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:43:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2022-03-18 02:43:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 02:43:30,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:30,970 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:30,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:31,187 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,SelfDestructingSolverStorable13 [2022-03-18 02:43:31,187 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2022-03-18 02:43:31,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:31,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1245361174] [2022-03-18 02:43:31,188 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 2 times [2022-03-18 02:43:31,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:31,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620662440] [2022-03-18 02:43:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:31,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:31,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:31,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996549810] [2022-03-18 02:43:31,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:31,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:31,198 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) [2022-03-18 02:43:31,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 02:43:31,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:31,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:43:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 02:43:31,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:43:31,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:31,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620662440] [2022-03-18 02:43:31,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:31,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996549810] [2022-03-18 02:43:31,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996549810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:31,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:31,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:31,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:31,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1245361174] [2022-03-18 02:43:31,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1245361174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:31,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:31,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:31,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661979873] [2022-03-18 02:43:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:31,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:43:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:43:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:43:31,339 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-03-18 02:43:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:31,404 INFO L93 Difference]: Finished difference Result 332 states and 473 transitions. [2022-03-18 02:43:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:43:31,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 46 [2022-03-18 02:43:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:31,407 INFO L225 Difference]: With dead ends: 332 [2022-03-18 02:43:31,407 INFO L226 Difference]: Without dead ends: 330 [2022-03-18 02:43:31,407 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:43:31,408 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:31,408 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 158 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-18 02:43:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-03-18 02:43:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 213 states have (on average 1.3427230046948357) internal successors, (286), 223 states have internal predecessors, (286), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-18 02:43:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 462 transitions. [2022-03-18 02:43:31,445 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 462 transitions. Word has length 46 [2022-03-18 02:43:31,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:31,445 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 462 transitions. [2022-03-18 02:43:31,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-03-18 02:43:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 462 transitions. [2022-03-18 02:43:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 02:43:31,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:31,446 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:31,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:31,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:31,659 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 1 times [2022-03-18 02:43:31,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:31,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95699334] [2022-03-18 02:43:31,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 2 times [2022-03-18 02:43:31,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:31,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166275106] [2022-03-18 02:43:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:31,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:31,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:31,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686527367] [2022-03-18 02:43:31,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:31,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:31,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:31,671 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) [2022-03-18 02:43:31,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 02:43:31,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:31,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:31,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 02:43:31,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:31,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:32,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:32,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166275106] [2022-03-18 02:43:32,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:32,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686527367] [2022-03-18 02:43:32,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686527367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:32,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:32,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 02:43:32,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95699334] [2022-03-18 02:43:32,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95699334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:32,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:32,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:43:32,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390521854] [2022-03-18 02:43:32,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:32,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:43:32,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:43:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:32,017 INFO L87 Difference]: Start difference. First operand 321 states and 462 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:32,116 INFO L93 Difference]: Finished difference Result 335 states and 475 transitions. [2022-03-18 02:43:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:43:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2022-03-18 02:43:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:32,119 INFO L225 Difference]: With dead ends: 335 [2022-03-18 02:43:32,119 INFO L226 Difference]: Without dead ends: 328 [2022-03-18 02:43:32,119 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:43:32,120 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 53 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:32,120 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 186 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-18 02:43:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2022-03-18 02:43:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 216 states have (on average 1.337962962962963) internal successors, (289), 226 states have internal predecessors, (289), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-18 02:43:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 465 transitions. [2022-03-18 02:43:32,177 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 465 transitions. Word has length 57 [2022-03-18 02:43:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:32,178 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 465 transitions. [2022-03-18 02:43:32,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 465 transitions. [2022-03-18 02:43:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 02:43:32,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:32,179 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:32,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:32,388 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,SelfDestructingSolverStorable15 [2022-03-18 02:43:32,389 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:32,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:32,389 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2022-03-18 02:43:32,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:32,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635785411] [2022-03-18 02:43:32,390 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:32,390 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 2 times [2022-03-18 02:43:32,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:32,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320961596] [2022-03-18 02:43:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:32,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:32,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:32,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680678678] [2022-03-18 02:43:32,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:32,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:32,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:32,401 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) [2022-03-18 02:43:32,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 02:43:32,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:32,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 02:43:32,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:43:33,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:43:39,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320961596] [2022-03-18 02:43:39,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680678678] [2022-03-18 02:43:39,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680678678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:39,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:39,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-18 02:43:39,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635785411] [2022-03-18 02:43:39,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635785411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:39,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:39,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:43:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863173370] [2022-03-18 02:43:39,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:39,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:43:39,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:39,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:43:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:43:39,199 INFO L87 Difference]: Start difference. First operand 324 states and 465 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:39,672 INFO L93 Difference]: Finished difference Result 384 states and 559 transitions. [2022-03-18 02:43:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:43:39,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2022-03-18 02:43:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:39,675 INFO L225 Difference]: With dead ends: 384 [2022-03-18 02:43:39,675 INFO L226 Difference]: Without dead ends: 381 [2022-03-18 02:43:39,675 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:43:39,676 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:39,676 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 474 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:43:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-18 02:43:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-03-18 02:43:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 243 states have (on average 1.345679012345679) internal successors, (327), 256 states have internal predecessors, (327), 113 states have call successors, (113), 21 states have call predecessors, (113), 20 states have return successors, (111), 99 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-18 02:43:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 551 transitions. [2022-03-18 02:43:39,722 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 551 transitions. Word has length 58 [2022-03-18 02:43:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:39,722 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 551 transitions. [2022-03-18 02:43:39,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 551 transitions. [2022-03-18 02:43:39,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 02:43:39,723 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:39,723 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:39,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:39,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 02:43:39,946 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:39,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:39,946 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2022-03-18 02:43:39,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:39,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [283391654] [2022-03-18 02:43:39,947 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:39,947 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 2 times [2022-03-18 02:43:39,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:39,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631418373] [2022-03-18 02:43:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:39,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:39,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:39,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174328881] [2022-03-18 02:43:39,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:39,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:39,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:39,956 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) [2022-03-18 02:43:39,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 02:43:40,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:40,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:40,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 02:43:40,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:40,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:40,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:40,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631418373] [2022-03-18 02:43:40,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174328881] [2022-03-18 02:43:40,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174328881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:40,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:40,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 02:43:40,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [283391654] [2022-03-18 02:43:40,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [283391654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:40,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:40,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:43:40,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567285296] [2022-03-18 02:43:40,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:40,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:43:40,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:40,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:43:40,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:40,276 INFO L87 Difference]: Start difference. First operand 377 states and 551 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:40,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:40,413 INFO L93 Difference]: Finished difference Result 604 states and 873 transitions. [2022-03-18 02:43:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:43:40,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2022-03-18 02:43:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:40,416 INFO L225 Difference]: With dead ends: 604 [2022-03-18 02:43:40,416 INFO L226 Difference]: Without dead ends: 440 [2022-03-18 02:43:40,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:43:40,418 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 69 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:40,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 216 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-18 02:43:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2022-03-18 02:43:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 279 states have (on average 1.3118279569892473) internal successors, (366), 290 states have internal predecessors, (366), 117 states have call successors, (117), 30 states have call predecessors, (117), 29 states have return successors, (115), 105 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-18 02:43:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 598 transitions. [2022-03-18 02:43:40,466 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 598 transitions. Word has length 63 [2022-03-18 02:43:40,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:40,466 INFO L478 AbstractCegarLoop]: Abstraction has 426 states and 598 transitions. [2022-03-18 02:43:40,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 598 transitions. [2022-03-18 02:43:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 02:43:40,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:40,467 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:40,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:40,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 02:43:40,684 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 3 times [2022-03-18 02:43:40,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:40,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [210712577] [2022-03-18 02:43:40,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:40,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 4 times [2022-03-18 02:43:40,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:40,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557725733] [2022-03-18 02:43:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:40,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:40,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:40,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207593785] [2022-03-18 02:43:40,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:43:40,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:40,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:40,704 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) [2022-03-18 02:43:40,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 02:43:40,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:43:40,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:40,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 02:43:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:40,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:41,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:41,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557725733] [2022-03-18 02:43:41,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:41,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207593785] [2022-03-18 02:43:41,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207593785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:41,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:41,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-18 02:43:41,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:41,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [210712577] [2022-03-18 02:43:41,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [210712577] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:41,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:41,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:43:41,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498531884] [2022-03-18 02:43:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:41,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:43:41,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:43:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:41,030 INFO L87 Difference]: Start difference. First operand 426 states and 598 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:41,196 INFO L93 Difference]: Finished difference Result 531 states and 722 transitions. [2022-03-18 02:43:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:43:41,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2022-03-18 02:43:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:41,200 INFO L225 Difference]: With dead ends: 531 [2022-03-18 02:43:41,200 INFO L226 Difference]: Without dead ends: 524 [2022-03-18 02:43:41,200 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:43:41,201 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 102 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:41,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 242 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-18 02:43:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 503. [2022-03-18 02:43:41,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 330 states have (on average 1.290909090909091) internal successors, (426), 346 states have internal predecessors, (426), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:43:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 691 transitions. [2022-03-18 02:43:41,259 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 691 transitions. Word has length 64 [2022-03-18 02:43:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:41,260 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 691 transitions. [2022-03-18 02:43:41,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 691 transitions. [2022-03-18 02:43:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 02:43:41,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:41,261 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:41,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:41,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:41,483 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2022-03-18 02:43:41,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:41,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1317487039] [2022-03-18 02:43:41,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 2 times [2022-03-18 02:43:41,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:41,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903986237] [2022-03-18 02:43:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:41,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:41,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:41,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876108004] [2022-03-18 02:43:41,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:41,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:41,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:41,493 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) [2022-03-18 02:43:41,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 02:43:41,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:41,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 02:43:41,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-18 02:43:41,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-18 02:43:41,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:41,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903986237] [2022-03-18 02:43:41,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:41,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876108004] [2022-03-18 02:43:41,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876108004] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:43:41,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:43:41,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-18 02:43:41,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:41,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1317487039] [2022-03-18 02:43:41,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1317487039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:41,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:41,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022005519] [2022-03-18 02:43:41,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:41,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:43:41,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:43:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:43:41,873 INFO L87 Difference]: Start difference. First operand 503 states and 691 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:43:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:41,968 INFO L93 Difference]: Finished difference Result 517 states and 704 transitions. [2022-03-18 02:43:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:43:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-18 02:43:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:41,972 INFO L225 Difference]: With dead ends: 517 [2022-03-18 02:43:41,972 INFO L226 Difference]: Without dead ends: 515 [2022-03-18 02:43:41,972 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:43:41,972 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:41,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:41,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-18 02:43:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2022-03-18 02:43:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 336 states have (on average 1.2797619047619047) internal successors, (430), 352 states have internal predecessors, (430), 134 states have call successors, (134), 41 states have call predecessors, (134), 40 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:43:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 695 transitions. [2022-03-18 02:43:42,033 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 695 transitions. Word has length 67 [2022-03-18 02:43:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:42,033 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 695 transitions. [2022-03-18 02:43:42,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:43:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 695 transitions. [2022-03-18 02:43:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 02:43:42,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:42,035 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:42,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:42,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:42,259 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 3 times [2022-03-18 02:43:42,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:42,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229719002] [2022-03-18 02:43:42,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 4 times [2022-03-18 02:43:42,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:42,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213286943] [2022-03-18 02:43:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:42,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:42,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:42,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146781584] [2022-03-18 02:43:42,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:43:42,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:42,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:42,269 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) [2022-03-18 02:43:42,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 02:43:42,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:43:42,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:42,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 02:43:42,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:42,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:42,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213286943] [2022-03-18 02:43:42,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146781584] [2022-03-18 02:43:42,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146781584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:42,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:42,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-18 02:43:42,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:42,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1229719002] [2022-03-18 02:43:42,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1229719002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:42,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:42,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:43:42,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171885484] [2022-03-18 02:43:42,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:42,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:43:42,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:42,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:43:42,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:43:42,512 INFO L87 Difference]: Start difference. First operand 511 states and 695 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:43:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:42,936 INFO L93 Difference]: Finished difference Result 857 states and 1271 transitions. [2022-03-18 02:43:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:43:42,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-03-18 02:43:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:42,941 INFO L225 Difference]: With dead ends: 857 [2022-03-18 02:43:42,941 INFO L226 Difference]: Without dead ends: 850 [2022-03-18 02:43:42,942 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:43:42,942 INFO L912 BasicCegarLoop]: 117 mSDtfsCounter, 82 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:42,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 565 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:43:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-03-18 02:43:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 567. [2022-03-18 02:43:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.3) internal successors, (494), 395 states have internal predecessors, (494), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-18 02:43:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 783 transitions. [2022-03-18 02:43:43,019 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 783 transitions. Word has length 65 [2022-03-18 02:43:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:43,019 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 783 transitions. [2022-03-18 02:43:43,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:43:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 783 transitions. [2022-03-18 02:43:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 02:43:43,020 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:43,020 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:43,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:43,242 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,SelfDestructingSolverStorable20 [2022-03-18 02:43:43,243 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2022-03-18 02:43:43,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:43,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7095384] [2022-03-18 02:43:43,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 2 times [2022-03-18 02:43:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:43,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411824673] [2022-03-18 02:43:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:43,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:43,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749952252] [2022-03-18 02:43:43,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:43,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:43,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:43,252 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) [2022-03-18 02:43:43,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 02:43:43,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:43,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:43,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 02:43:43,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:43,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:43,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:43,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411824673] [2022-03-18 02:43:43,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:43,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749952252] [2022-03-18 02:43:43,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749952252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:43,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:43,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 02:43:43,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:43,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7095384] [2022-03-18 02:43:43,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7095384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:43,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:43,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:43:43,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823611915] [2022-03-18 02:43:43,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:43,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:43:43,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:43,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:43:43,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:43,544 INFO L87 Difference]: Start difference. First operand 567 states and 783 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:43,710 INFO L93 Difference]: Finished difference Result 839 states and 1203 transitions. [2022-03-18 02:43:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:43:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-03-18 02:43:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:43,717 INFO L225 Difference]: With dead ends: 839 [2022-03-18 02:43:43,717 INFO L226 Difference]: Without dead ends: 567 [2022-03-18 02:43:43,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:43:43,719 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 85 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:43,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 199 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-18 02:43:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-03-18 02:43:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.2894736842105263) internal successors, (490), 395 states have internal predecessors, (490), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-18 02:43:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 779 transitions. [2022-03-18 02:43:43,797 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 779 transitions. Word has length 65 [2022-03-18 02:43:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:43,797 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 779 transitions. [2022-03-18 02:43:43,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 779 transitions. [2022-03-18 02:43:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 02:43:43,800 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:43,800 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:43,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-18 02:43:44,023 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,SelfDestructingSolverStorable21 [2022-03-18 02:43:44,023 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:44,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:44,024 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2022-03-18 02:43:44,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:44,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970973766] [2022-03-18 02:43:44,024 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:44,024 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 2 times [2022-03-18 02:43:44,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:44,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094771378] [2022-03-18 02:43:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:44,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:44,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:44,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359669673] [2022-03-18 02:43:44,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:44,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:44,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:44,033 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) [2022-03-18 02:43:44,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 02:43:44,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:44,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:44,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 02:43:44,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-18 02:43:44,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:43:44,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:44,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094771378] [2022-03-18 02:43:44,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:44,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359669673] [2022-03-18 02:43:44,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359669673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:44,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:44,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:44,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970973766] [2022-03-18 02:43:44,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970973766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:44,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:44,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:43:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079513473] [2022-03-18 02:43:44,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:44,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:43:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:43:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:43:44,178 INFO L87 Difference]: Start difference. First operand 567 states and 779 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:43:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:44,319 INFO L93 Difference]: Finished difference Result 980 states and 1387 transitions. [2022-03-18 02:43:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:43:44,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-03-18 02:43:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:44,323 INFO L225 Difference]: With dead ends: 980 [2022-03-18 02:43:44,324 INFO L226 Difference]: Without dead ends: 624 [2022-03-18 02:43:44,325 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:43:44,326 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:44,326 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:43:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-03-18 02:43:44,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 568. [2022-03-18 02:43:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 395 states have (on average 1.3012658227848102) internal successors, (514), 400 states have internal predecessors, (514), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:43:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 779 transitions. [2022-03-18 02:43:44,436 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 779 transitions. Word has length 69 [2022-03-18 02:43:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:44,436 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 779 transitions. [2022-03-18 02:43:44,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:43:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 779 transitions. [2022-03-18 02:43:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 02:43:44,437 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:44,437 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:44,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:44,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:44,660 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 3 times [2022-03-18 02:43:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [30580566] [2022-03-18 02:43:44,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 4 times [2022-03-18 02:43:44,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:44,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659689082] [2022-03-18 02:43:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:44,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:44,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585185684] [2022-03-18 02:43:44,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:43:44,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:44,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:44,676 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) [2022-03-18 02:43:44,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 02:43:44,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:43:44,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 02:43:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:44,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:45,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:45,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659689082] [2022-03-18 02:43:45,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:45,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585185684] [2022-03-18 02:43:45,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585185684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:45,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:45,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-18 02:43:45,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:45,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [30580566] [2022-03-18 02:43:45,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [30580566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:45,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:45,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:43:45,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653643406] [2022-03-18 02:43:45,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:45,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:43:45,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:43:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:45,025 INFO L87 Difference]: Start difference. First operand 568 states and 779 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:45,220 INFO L93 Difference]: Finished difference Result 914 states and 1304 transitions. [2022-03-18 02:43:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:43:45,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-03-18 02:43:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:45,224 INFO L225 Difference]: With dead ends: 914 [2022-03-18 02:43:45,224 INFO L226 Difference]: Without dead ends: 584 [2022-03-18 02:43:45,226 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:43:45,226 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 116 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:45,226 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 243 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-18 02:43:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 575. [2022-03-18 02:43:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 402 states have (on average 1.2960199004975124) internal successors, (521), 404 states have internal predecessors, (521), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:43:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 786 transitions. [2022-03-18 02:43:45,327 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 786 transitions. Word has length 69 [2022-03-18 02:43:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:45,327 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 786 transitions. [2022-03-18 02:43:45,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 786 transitions. [2022-03-18 02:43:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 02:43:45,328 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:45,329 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:45,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:45,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:45,551 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 3 times [2022-03-18 02:43:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:45,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645013983] [2022-03-18 02:43:45,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 4 times [2022-03-18 02:43:45,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:45,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321314420] [2022-03-18 02:43:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:45,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:45,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363972786] [2022-03-18 02:43:45,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:43:45,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:45,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:45,561 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) [2022-03-18 02:43:45,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 02:43:45,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:43:45,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:45,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:43:45,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:45,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:45,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:45,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321314420] [2022-03-18 02:43:45,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:45,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363972786] [2022-03-18 02:43:45,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363972786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:45,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:45,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-03-18 02:43:45,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:45,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645013983] [2022-03-18 02:43:45,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645013983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:45,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:45,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:43:45,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140833989] [2022-03-18 02:43:45,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:45,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:43:45,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:45,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:43:45,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:45,894 INFO L87 Difference]: Start difference. First operand 575 states and 786 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:46,100 INFO L93 Difference]: Finished difference Result 918 states and 1274 transitions. [2022-03-18 02:43:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:43:46,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2022-03-18 02:43:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:46,104 INFO L225 Difference]: With dead ends: 918 [2022-03-18 02:43:46,104 INFO L226 Difference]: Without dead ends: 688 [2022-03-18 02:43:46,106 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:43:46,107 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 132 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:46,107 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 263 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-18 02:43:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 658. [2022-03-18 02:43:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 457 states have (on average 1.2735229759299782) internal successors, (582), 460 states have internal predecessors, (582), 151 states have call successors, (151), 50 states have call predecessors, (151), 49 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-18 02:43:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 880 transitions. [2022-03-18 02:43:46,208 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 880 transitions. Word has length 70 [2022-03-18 02:43:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:46,208 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 880 transitions. [2022-03-18 02:43:46,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 880 transitions. [2022-03-18 02:43:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 02:43:46,210 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:46,211 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:46,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-18 02:43:46,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 02:43:46,426 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2022-03-18 02:43:46,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:46,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [457193473] [2022-03-18 02:43:46,427 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 2 times [2022-03-18 02:43:46,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:46,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951862090] [2022-03-18 02:43:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:46,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:46,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:46,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670014406] [2022-03-18 02:43:46,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:46,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:46,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:46,438 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:43:46,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 02:43:46,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:46,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:46,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 02:43:46,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 02:43:46,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 02:43:46,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:46,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951862090] [2022-03-18 02:43:46,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:46,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670014406] [2022-03-18 02:43:46,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670014406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:46,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:46,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:43:46,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:46,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [457193473] [2022-03-18 02:43:46,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [457193473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:46,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:46,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:43:46,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205436985] [2022-03-18 02:43:46,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:46,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:43:46,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:46,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:43:46,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:43:46,754 INFO L87 Difference]: Start difference. First operand 658 states and 880 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:43:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:46,967 INFO L93 Difference]: Finished difference Result 757 states and 1022 transitions. [2022-03-18 02:43:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:43:46,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-03-18 02:43:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:46,971 INFO L225 Difference]: With dead ends: 757 [2022-03-18 02:43:46,971 INFO L226 Difference]: Without dead ends: 755 [2022-03-18 02:43:46,972 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:43:46,972 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:46,972 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 233 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-18 02:43:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 748. [2022-03-18 02:43:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 537 states have (on average 1.297951582867784) internal successors, (697), 546 states have internal predecessors, (697), 160 states have call successors, (160), 51 states have call predecessors, (160), 50 states have return successors, (156), 150 states have call predecessors, (156), 156 states have call successors, (156) [2022-03-18 02:43:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1013 transitions. [2022-03-18 02:43:47,082 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1013 transitions. Word has length 70 [2022-03-18 02:43:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:47,082 INFO L478 AbstractCegarLoop]: Abstraction has 748 states and 1013 transitions. [2022-03-18 02:43:47,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:43:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1013 transitions. [2022-03-18 02:43:47,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 02:43:47,083 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:47,084 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 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] [2022-03-18 02:43:47,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:47,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 02:43:47,308 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2022-03-18 02:43:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:47,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3520265] [2022-03-18 02:43:47,309 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 4 times [2022-03-18 02:43:47,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:47,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897464447] [2022-03-18 02:43:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:47,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:47,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:47,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558882203] [2022-03-18 02:43:47,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:43:47,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:47,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:47,319 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:43:47,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 02:43:47,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:43:47,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:47,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 02:43:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 02:43:48,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-18 02:43:48,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:48,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897464447] [2022-03-18 02:43:48,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:48,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558882203] [2022-03-18 02:43:48,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558882203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:48,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:48,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-03-18 02:43:48,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:48,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3520265] [2022-03-18 02:43:48,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3520265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:48,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:48,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:43:48,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230033845] [2022-03-18 02:43:48,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:48,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:43:48,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:43:48,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:43:48,606 INFO L87 Difference]: Start difference. First operand 748 states and 1013 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-18 02:43:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:49,183 INFO L93 Difference]: Finished difference Result 840 states and 1136 transitions. [2022-03-18 02:43:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:43:49,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 75 [2022-03-18 02:43:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:49,187 INFO L225 Difference]: With dead ends: 840 [2022-03-18 02:43:49,188 INFO L226 Difference]: Without dead ends: 838 [2022-03-18 02:43:49,188 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:43:49,189 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 81 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:49,189 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 647 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:43:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-18 02:43:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 813. [2022-03-18 02:43:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 579 states have (on average 1.302245250431779) internal successors, (754), 589 states have internal predecessors, (754), 178 states have call successors, (178), 56 states have call predecessors, (178), 55 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-18 02:43:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1106 transitions. [2022-03-18 02:43:49,329 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1106 transitions. Word has length 75 [2022-03-18 02:43:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:49,329 INFO L478 AbstractCegarLoop]: Abstraction has 813 states and 1106 transitions. [2022-03-18 02:43:49,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-18 02:43:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1106 transitions. [2022-03-18 02:43:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-18 02:43:49,330 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:49,330 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:49,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:49,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 02:43:49,548 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:49,549 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 5 times [2022-03-18 02:43:49,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:49,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1914469489] [2022-03-18 02:43:49,549 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:49,549 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 6 times [2022-03-18 02:43:49,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:49,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414496097] [2022-03-18 02:43:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:49,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:49,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927508125] [2022-03-18 02:43:49,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:43:49,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:49,558 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:43:49,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 02:43:49,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:43:49,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:43:49,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:49,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:43:49,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414496097] [2022-03-18 02:43:49,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927508125] [2022-03-18 02:43:49,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927508125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:49,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:49,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-03-18 02:43:49,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:49,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1914469489] [2022-03-18 02:43:49,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1914469489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:49,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:49,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:43:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934870389] [2022-03-18 02:43:49,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:49,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:43:49,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:49,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:43:49,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:49,931 INFO L87 Difference]: Start difference. First operand 813 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:50,258 INFO L93 Difference]: Finished difference Result 1433 states and 1997 transitions. [2022-03-18 02:43:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:43:50,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2022-03-18 02:43:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:50,264 INFO L225 Difference]: With dead ends: 1433 [2022-03-18 02:43:50,264 INFO L226 Difference]: Without dead ends: 975 [2022-03-18 02:43:50,266 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:43:50,266 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 156 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:50,266 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 307 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:43:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-18 02:43:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 947. [2022-03-18 02:43:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 673 states have (on average 1.274888558692422) internal successors, (858), 683 states have internal predecessors, (858), 205 states have call successors, (205), 69 states have call predecessors, (205), 68 states have return successors, (200), 194 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-18 02:43:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1263 transitions. [2022-03-18 02:43:50,426 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1263 transitions. Word has length 76 [2022-03-18 02:43:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:50,426 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1263 transitions. [2022-03-18 02:43:50,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:43:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1263 transitions. [2022-03-18 02:43:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 02:43:50,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:50,427 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:50,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:50,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 02:43:50,642 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:50,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:50,642 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2022-03-18 02:43:50,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:50,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630959736] [2022-03-18 02:43:50,642 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 2 times [2022-03-18 02:43:50,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:50,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048028341] [2022-03-18 02:43:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:50,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:50,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:50,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879761288] [2022-03-18 02:43:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:50,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:50,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:50,651 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:43:50,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 02:43:50,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:50,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 02:43:50,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:43:51,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:43:52,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:52,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048028341] [2022-03-18 02:43:52,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:52,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879761288] [2022-03-18 02:43:52,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879761288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:52,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:52,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-18 02:43:52,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:52,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630959736] [2022-03-18 02:43:52,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630959736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:52,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:52,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:43:52,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639243371] [2022-03-18 02:43:52,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:52,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:43:52,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:43:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:43:52,861 INFO L87 Difference]: Start difference. First operand 947 states and 1263 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-18 02:43:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:54,421 INFO L93 Difference]: Finished difference Result 1025 states and 1371 transitions. [2022-03-18 02:43:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:43:54,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2022-03-18 02:43:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:54,426 INFO L225 Difference]: With dead ends: 1025 [2022-03-18 02:43:54,426 INFO L226 Difference]: Without dead ends: 1022 [2022-03-18 02:43:54,427 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-18 02:43:54,428 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 76 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:54,428 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 553 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:43:54,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-03-18 02:43:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 957. [2022-03-18 02:43:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2695139911634756) internal successors, (862), 689 states have internal predecessors, (862), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-18 02:43:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1272 transitions. [2022-03-18 02:43:54,577 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1272 transitions. Word has length 81 [2022-03-18 02:43:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:54,578 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1272 transitions. [2022-03-18 02:43:54,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-18 02:43:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1272 transitions. [2022-03-18 02:43:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 02:43:54,579 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:54,579 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:54,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:54,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 02:43:54,801 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2022-03-18 02:43:54,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:54,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1276563328] [2022-03-18 02:43:54,802 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 2 times [2022-03-18 02:43:54,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:54,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015339788] [2022-03-18 02:43:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:54,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:54,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:54,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848501512] [2022-03-18 02:43:54,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:54,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:54,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:54,812 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:43:54,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 02:43:54,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:54,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:54,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:43:54,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:43:55,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:43:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015339788] [2022-03-18 02:43:55,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848501512] [2022-03-18 02:43:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848501512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:55,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:55,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-03-18 02:43:55,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1276563328] [2022-03-18 02:43:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1276563328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:55,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:55,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:43:55,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684980994] [2022-03-18 02:43:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:55,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:43:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:43:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:43:55,199 INFO L87 Difference]: Start difference. First operand 957 states and 1272 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:43:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:55,481 INFO L93 Difference]: Finished difference Result 966 states and 1279 transitions. [2022-03-18 02:43:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:43:55,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2022-03-18 02:43:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:55,486 INFO L225 Difference]: With dead ends: 966 [2022-03-18 02:43:55,486 INFO L226 Difference]: Without dead ends: 959 [2022-03-18 02:43:55,487 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:43:55,488 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 132 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:55,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 250 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:43:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-18 02:43:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 957. [2022-03-18 02:43:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2665684830633284) internal successors, (860), 689 states have internal predecessors, (860), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-18 02:43:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1270 transitions. [2022-03-18 02:43:55,639 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1270 transitions. Word has length 87 [2022-03-18 02:43:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:55,639 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1270 transitions. [2022-03-18 02:43:55,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:43:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1270 transitions. [2022-03-18 02:43:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-18 02:43:55,641 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:55,641 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:55,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:55,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:55,864 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:55,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 3 times [2022-03-18 02:43:55,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:55,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1852123259] [2022-03-18 02:43:55,864 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 4 times [2022-03-18 02:43:55,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:55,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096578794] [2022-03-18 02:43:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:55,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:55,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:55,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258901473] [2022-03-18 02:43:55,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:43:55,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:55,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:55,873 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:43:55,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 02:43:55,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:43:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-18 02:43:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 40 proven. 47 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-18 02:43:56,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:57,791 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:43:58,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:58,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096578794] [2022-03-18 02:43:58,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:58,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258901473] [2022-03-18 02:43:58,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258901473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:43:58,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:43:58,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-18 02:43:58,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:58,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1852123259] [2022-03-18 02:43:58,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1852123259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:58,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:58,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:43:58,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418840693] [2022-03-18 02:43:58,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:58,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:43:58,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:43:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:43:58,602 INFO L87 Difference]: Start difference. First operand 957 states and 1270 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:00,578 INFO L93 Difference]: Finished difference Result 1069 states and 1430 transitions. [2022-03-18 02:44:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:44:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2022-03-18 02:44:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:00,584 INFO L225 Difference]: With dead ends: 1069 [2022-03-18 02:44:00,584 INFO L226 Difference]: Without dead ends: 1066 [2022-03-18 02:44:00,584 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-03-18 02:44:00,585 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 92 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:00,585 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 904 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 02:44:00,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-03-18 02:44:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1023. [2022-03-18 02:44:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 720 states have (on average 1.275) internal successors, (918), 731 states have internal predecessors, (918), 229 states have call successors, (229), 74 states have call predecessors, (229), 73 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-18 02:44:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1372 transitions. [2022-03-18 02:44:00,758 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1372 transitions. Word has length 88 [2022-03-18 02:44:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:00,758 INFO L478 AbstractCegarLoop]: Abstraction has 1023 states and 1372 transitions. [2022-03-18 02:44:00,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1372 transitions. [2022-03-18 02:44:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 02:44:00,759 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:00,760 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:00,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:00,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 02:44:00,981 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 5 times [2022-03-18 02:44:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:00,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [559838374] [2022-03-18 02:44:00,982 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 6 times [2022-03-18 02:44:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:00,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696659212] [2022-03-18 02:44:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:00,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:00,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:00,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000549035] [2022-03-18 02:44:00,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:44:00,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:00,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:00,992 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:00,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 02:44:01,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:44:01,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:01,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:44:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:01,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:01,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:01,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696659212] [2022-03-18 02:44:01,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:01,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000549035] [2022-03-18 02:44:01,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000549035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:01,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:01,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-03-18 02:44:01,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:01,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [559838374] [2022-03-18 02:44:01,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [559838374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:01,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:01,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:44:01,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399358476] [2022-03-18 02:44:01,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:01,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:44:01,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:44:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:44:01,427 INFO L87 Difference]: Start difference. First operand 1023 states and 1372 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:01,677 INFO L93 Difference]: Finished difference Result 1058 states and 1407 transitions. [2022-03-18 02:44:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:44:01,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2022-03-18 02:44:01,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:01,681 INFO L225 Difference]: With dead ends: 1058 [2022-03-18 02:44:01,681 INFO L226 Difference]: Without dead ends: 1051 [2022-03-18 02:44:01,682 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:44:01,682 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 150 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:01,682 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 298 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-03-18 02:44:01,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1034. [2022-03-18 02:44:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 731 states have (on average 1.2708618331053352) internal successors, (929), 742 states have internal predecessors, (929), 229 states have call successors, (229), 74 states have call predecessors, (229), 73 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-18 02:44:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1383 transitions. [2022-03-18 02:44:01,869 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1383 transitions. Word has length 91 [2022-03-18 02:44:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:01,869 INFO L478 AbstractCegarLoop]: Abstraction has 1034 states and 1383 transitions. [2022-03-18 02:44:01,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1383 transitions. [2022-03-18 02:44:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 02:44:01,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:01,871 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:01,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:02,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:02,090 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:02,090 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2022-03-18 02:44:02,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:02,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1291937754] [2022-03-18 02:44:02,091 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:02,091 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 2 times [2022-03-18 02:44:02,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:02,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697872861] [2022-03-18 02:44:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:02,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:02,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:02,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794035368] [2022-03-18 02:44:02,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:02,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:02,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:02,102 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:02,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 02:44:02,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:44:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:02,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:02,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697872861] [2022-03-18 02:44:02,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794035368] [2022-03-18 02:44:02,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794035368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:02,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:02,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-03-18 02:44:02,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1291937754] [2022-03-18 02:44:02,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1291937754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:02,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:02,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:44:02,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419887784] [2022-03-18 02:44:02,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:02,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:44:02,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:02,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:44:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:44:02,505 INFO L87 Difference]: Start difference. First operand 1034 states and 1383 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:02,790 INFO L93 Difference]: Finished difference Result 1378 states and 1899 transitions. [2022-03-18 02:44:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:44:02,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2022-03-18 02:44:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:02,795 INFO L225 Difference]: With dead ends: 1378 [2022-03-18 02:44:02,795 INFO L226 Difference]: Without dead ends: 1058 [2022-03-18 02:44:02,797 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:44:02,797 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 162 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:02,799 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 290 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-03-18 02:44:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1054. [2022-03-18 02:44:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 751 states have (on average 1.2623169107856191) internal successors, (948), 762 states have internal predecessors, (948), 229 states have call successors, (229), 74 states have call predecessors, (229), 73 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-18 02:44:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1402 transitions. [2022-03-18 02:44:02,946 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1402 transitions. Word has length 93 [2022-03-18 02:44:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:02,947 INFO L478 AbstractCegarLoop]: Abstraction has 1054 states and 1402 transitions. [2022-03-18 02:44:02,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1402 transitions. [2022-03-18 02:44:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 02:44:02,948 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:02,948 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:02,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:03,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:03,171 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:03,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 5 times [2022-03-18 02:44:03,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:03,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2075507102] [2022-03-18 02:44:03,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 6 times [2022-03-18 02:44:03,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:03,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669150858] [2022-03-18 02:44:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:03,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:03,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:03,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474071764] [2022-03-18 02:44:03,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:44:03,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:03,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:03,181 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:03,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 02:44:03,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:44:03,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 02:44:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:03,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:03,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:03,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669150858] [2022-03-18 02:44:03,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:03,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474071764] [2022-03-18 02:44:03,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474071764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:03,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:03,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-03-18 02:44:03,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2075507102] [2022-03-18 02:44:03,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2075507102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:03,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:03,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:44:03,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998366306] [2022-03-18 02:44:03,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:03,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:44:03,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:44:03,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:44:03,710 INFO L87 Difference]: Start difference. First operand 1054 states and 1402 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:04,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:04,095 INFO L93 Difference]: Finished difference Result 1535 states and 2087 transitions. [2022-03-18 02:44:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:44:04,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-18 02:44:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:04,101 INFO L225 Difference]: With dead ends: 1535 [2022-03-18 02:44:04,101 INFO L226 Difference]: Without dead ends: 1215 [2022-03-18 02:44:04,102 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:44:04,103 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 181 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:04,103 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 314 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:44:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-03-18 02:44:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1160. [2022-03-18 02:44:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 809 states have (on average 1.2571075401730532) internal successors, (1017), 821 states have internal predecessors, (1017), 262 states have call successors, (262), 89 states have call predecessors, (262), 88 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2022-03-18 02:44:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1536 transitions. [2022-03-18 02:44:04,305 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1536 transitions. Word has length 97 [2022-03-18 02:44:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:04,306 INFO L478 AbstractCegarLoop]: Abstraction has 1160 states and 1536 transitions. [2022-03-18 02:44:04,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1536 transitions. [2022-03-18 02:44:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-18 02:44:04,307 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:04,307 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:04,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:04,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-18 02:44:04,527 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 7 times [2022-03-18 02:44:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:04,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [481329342] [2022-03-18 02:44:04,528 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 8 times [2022-03-18 02:44:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:04,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028841497] [2022-03-18 02:44:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:04,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:04,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:04,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067685872] [2022-03-18 02:44:04,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:04,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:04,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:04,537 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:04,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 02:44:04,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:04,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-18 02:44:04,598 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 02:44:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 02:44:04,668 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 02:44:04,668 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-18 02:44:04,668 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 02:44:04,671 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 02:44:04,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:04,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 02:44:04,894 INFO L718 BasicCegarLoop]: Path program histogram: [8, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-18 02:44:04,896 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 02:44:04,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 02:44:04 BoogieIcfgContainer [2022-03-18 02:44:04,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 02:44:04,919 INFO L158 Benchmark]: Toolchain (without parser) took 42522.02ms. Allocated memory was 183.5MB in the beginning and 413.1MB in the end (delta: 229.6MB). Free memory was 134.2MB in the beginning and 299.8MB in the end (delta: -165.6MB). Peak memory consumption was 64.2MB. Max. memory is 8.0GB. [2022-03-18 02:44:04,919 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 183.5MB. Free memory was 150.7MB in the beginning and 150.7MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 02:44:04,919 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.67ms. Allocated memory is still 183.5MB. Free memory was 134.0MB in the beginning and 159.1MB in the end (delta: -25.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 02:44:04,919 INFO L158 Benchmark]: Boogie Preprocessor took 29.21ms. Allocated memory is still 183.5MB. Free memory was 159.1MB in the beginning and 157.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 02:44:04,919 INFO L158 Benchmark]: RCFGBuilder took 259.05ms. Allocated memory is still 183.5MB. Free memory was 157.5MB in the beginning and 145.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 02:44:04,919 INFO L158 Benchmark]: TraceAbstraction took 42008.55ms. Allocated memory was 183.5MB in the beginning and 413.1MB in the end (delta: 229.6MB). Free memory was 145.4MB in the beginning and 299.8MB in the end (delta: -154.4MB). Peak memory consumption was 76.3MB. Max. memory is 8.0GB. [2022-03-18 02:44:04,920 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 183.5MB. Free memory was 150.7MB in the beginning and 150.7MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 221.67ms. Allocated memory is still 183.5MB. Free memory was 134.0MB in the beginning and 159.1MB in the end (delta: -25.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.21ms. Allocated memory is still 183.5MB. Free memory was 159.1MB in the beginning and 157.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 259.05ms. Allocated memory is still 183.5MB. Free memory was 157.5MB in the beginning and 145.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 42008.55ms. Allocated memory was 183.5MB in the beginning and 413.1MB in the end (delta: 229.6MB). Free memory was 145.4MB in the beginning and 299.8MB in the end (delta: -154.4MB). Peak memory consumption was 76.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b [L48] EXPR counter++ [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y * r + x * p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(a == k * b + c) [L52] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L52] RET __VERIFIER_assert(v == b * d) [L54] COND TRUE !(c >= 2 * v) [L59] c = c - v [L60] k = k + d [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b [L48] EXPR counter++ [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y * r + x * p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(a == k * b + c) [L52] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L52] RET __VERIFIER_assert(v == b * d) [L54] COND TRUE !(c >= 2 * v) [L59] c = c - v [L60] k = k + d [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 41.9s, OverallIterations: 35, TraceHistogramMax: 9, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.1s, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2416 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2302 mSDsluCounter, 9545 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7617 mSDsCounter, 1226 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5012 IncrementalHoareTripleChecker+Invalid, 6238 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1226 mSolverCounterUnsat, 1928 mSDtfsCounter, 5012 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3502 GetRequests, 3037 SyntacticMatches, 22 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1160occurred in iteration=34, InterpolantAutomatonStates: 364, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 34 MinimizatonAttempts, 848 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-18 02:44:04,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...