/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 05:59:42,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 05:59:42,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 05:59:42,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 05:59:42,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 05:59:42,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 05:59:42,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 05:59:42,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 05:59:42,226 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 05:59:42,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 05:59:42,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 05:59:42,229 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 05:59:42,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 05:59:42,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 05:59:42,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 05:59:42,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 05:59:42,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 05:59:42,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 05:59:42,230 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 05:59:42,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 05:59:42,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 05:59:42,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 05:59:42,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 05:59:42,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 05:59:42,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 05:59:42,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 05:59:42,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:59:42,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 05:59:42,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 05:59:42,231 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 05:59:42,231 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 05:59:42,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 05:59:42,231 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 05:59:42,231 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 05:59:42,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 05:59:42,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 05:59:42,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 05:59:42,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 05:59:42,457 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 05:59:42,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound50.c [2022-03-19 05:59:42,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0134ad735/629ea6687a034277b5782f15886898b0/FLAG7ede27622 [2022-03-19 05:59:42,823 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 05:59:42,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound50.c [2022-03-19 05:59:42,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0134ad735/629ea6687a034277b5782f15886898b0/FLAG7ede27622 [2022-03-19 05:59:43,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0134ad735/629ea6687a034277b5782f15886898b0 [2022-03-19 05:59:43,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 05:59:43,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 05:59:43,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 05:59:43,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 05:59:43,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 05:59:43,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@192f0d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43, skipping insertion in model container [2022-03-19 05:59:43,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 05:59:43,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 05:59:43,414 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/mannadiv_unwindbound50.c[573,586] [2022-03-19 05:59:43,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:59:43,429 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 05:59:43,436 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/mannadiv_unwindbound50.c[573,586] [2022-03-19 05:59:43,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:59:43,447 INFO L208 MainTranslator]: Completed translation [2022-03-19 05:59:43,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43 WrapperNode [2022-03-19 05:59:43,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 05:59:43,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 05:59:43,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 05:59:43,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 05:59:43,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 05:59:43,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 05:59:43,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 05:59:43,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 05:59:43,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43" (1/1) ... [2022-03-19 05:59:43,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:59:43,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:43,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 05:59:43,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 05:59:43,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 05:59:43,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 05:59:43,564 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 05:59:43,564 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 05:59:43,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 05:59:43,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 05:59:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 05:59:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 05:59:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 05:59:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 05:59:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 05:59:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 05:59:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 05:59:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 05:59:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 05:59:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 05:59:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 05:59:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 05:59:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 05:59:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 05:59:43,607 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 05:59:43,608 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 05:59:43,710 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 05:59:43,713 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 05:59:43,713 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 05:59:43,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:59:43 BoogieIcfgContainer [2022-03-19 05:59:43,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 05:59:43,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 05:59:43,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 05:59:43,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 05:59:43,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 05:59:43" (1/3) ... [2022-03-19 05:59:43,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e476fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:59:43, skipping insertion in model container [2022-03-19 05:59:43,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:59:43" (2/3) ... [2022-03-19 05:59:43,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e476fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:59:43, skipping insertion in model container [2022-03-19 05:59:43,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:59:43" (3/3) ... [2022-03-19 05:59:43,734 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound50.c [2022-03-19 05:59:43,739 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 05:59:43,740 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 05:59:43,782 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 05:59:43,786 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 05:59:43,786 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 05:59:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 05:59:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 05:59:43,823 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:43,823 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:43,824 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:43,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:43,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-03-19 05:59:43,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:43,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440270601] [2022-03-19 05:59:43,854 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-03-19 05:59:43,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:43,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765328792] [2022-03-19 05:59:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:43,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:59:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:59:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:59:44,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:59:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:59:44,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 05:59:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:59:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:44,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:44,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765328792] [2022-03-19 05:59:44,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765328792] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:44,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:44,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:59:44,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:44,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440270601] [2022-03-19 05:59:44,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440270601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:44,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:44,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:59:44,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178316374] [2022-03-19 05:59:44,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:44,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 05:59:44,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:44,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 05:59:44,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 05:59:44,052 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2022-03-19 05:59:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:44,126 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2022-03-19 05:59:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 05:59:44,128 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 [2022-03-19 05:59:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:44,135 INFO L225 Difference]: With dead ends: 54 [2022-03-19 05:59:44,136 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 05:59:44,138 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 [2022-03-19 05:59:44,141 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:44,142 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:44,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 05:59:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-19 05:59:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 05:59:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-19 05:59:44,173 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-19 05:59:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:44,173 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-19 05:59:44,174 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) [2022-03-19 05:59:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-19 05:59:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 05:59:44,175 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:44,175 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] [2022-03-19 05:59:44,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 05:59:44,176 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-03-19 05:59:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:44,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [489460283] [2022-03-19 05:59:44,184 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-03-19 05:59:44,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:44,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027884336] [2022-03-19 05:59:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:44,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:44,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:44,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251688154] [2022-03-19 05:59:44,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:59:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:44,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:44,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 05:59:44,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 05:59:44,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 05:59:44,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:44,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:59:44,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027884336] [2022-03-19 05:59:44,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251688154] [2022-03-19 05:59:44,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251688154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:44,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:44,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 05:59:44,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:44,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [489460283] [2022-03-19 05:59:44,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [489460283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:44,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:44,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 05:59:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376502234] [2022-03-19 05:59:44,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:44,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 05:59:44,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:44,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 05:59:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 05:59:44,411 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2022-03-19 05:59:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:44,426 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-19 05:59:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 05:59:44,427 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 [2022-03-19 05:59:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:44,428 INFO L225 Difference]: With dead ends: 34 [2022-03-19 05:59:44,428 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 05:59:44,429 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 [2022-03-19 05:59:44,430 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:44,433 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:44,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 05:59:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 05:59:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 05:59:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-19 05:59:44,447 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-19 05:59:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:44,449 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-19 05:59:44,449 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) [2022-03-19 05:59:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-19 05:59:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 05:59:44,450 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:44,450 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] [2022-03-19 05:59:44,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:44,664 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 [2022-03-19 05:59:44,664 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-03-19 05:59:44,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:44,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [352343234] [2022-03-19 05:59:44,666 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-03-19 05:59:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:44,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486950677] [2022-03-19 05:59:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:44,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:44,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:44,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889922898] [2022-03-19 05:59:44,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:59:44,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:44,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:44,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:44,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 05:59:44,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 05:59:44,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 05:59:44,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:44,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:59:44,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486950677] [2022-03-19 05:59:44,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889922898] [2022-03-19 05:59:44,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889922898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:44,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:44,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:59:44,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:44,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [352343234] [2022-03-19 05:59:44,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [352343234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:44,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:44,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:59:44,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977597186] [2022-03-19 05:59:44,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:44,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:59:44,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:44,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:59:44,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:59:44,837 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-19 05:59:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:44,865 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-03-19 05:59:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:59:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 23 [2022-03-19 05:59:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:44,867 INFO L225 Difference]: With dead ends: 37 [2022-03-19 05:59:44,867 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 05:59:44,867 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:59:44,868 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:44,868 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 05:59:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-03-19 05:59:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 05:59:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-19 05:59:44,874 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-03-19 05:59:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:44,874 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-19 05:59:44,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-19 05:59:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-19 05:59:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 05:59:44,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:44,875 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] [2022-03-19 05:59:44,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:45,095 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 [2022-03-19 05:59:45,096 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-03-19 05:59:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:45,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329056179] [2022-03-19 05:59:45,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-03-19 05:59:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:45,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896050017] [2022-03-19 05:59:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:45,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:45,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507834961] [2022-03-19 05:59:45,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:59:45,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:45,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:45,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 05:59:45,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:59:45,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:45,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 05:59:45,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:45,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:45,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:45,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896050017] [2022-03-19 05:59:45,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:45,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507834961] [2022-03-19 05:59:45,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507834961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:45,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:45,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 05:59:45,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:45,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329056179] [2022-03-19 05:59:45,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329056179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:45,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:45,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 05:59:45,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097013410] [2022-03-19 05:59:45,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:45,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 05:59:45,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:45,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 05:59:45,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:59:45,381 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 05:59:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:45,435 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-19 05:59:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 05:59:45,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-19 05:59:45,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:45,436 INFO L225 Difference]: With dead ends: 39 [2022-03-19 05:59:45,437 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 05:59:45,437 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 05:59:45,438 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:45,438 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 05:59:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-03-19 05:59:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 05:59:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-19 05:59:45,442 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-19 05:59:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:45,443 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-19 05:59:45,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 05:59:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-19 05:59:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 05:59:45,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:45,444 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] [2022-03-19 05:59:45,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-19 05:59:45,658 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 [2022-03-19 05:59:45,659 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-03-19 05:59:45,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:45,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260036641] [2022-03-19 05:59:45,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:45,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-03-19 05:59:45,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:45,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825606845] [2022-03-19 05:59:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:45,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:45,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:45,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897914373] [2022-03-19 05:59:45,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:59:45,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:45,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:45,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:45,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 05:59:45,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:59:45,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:45,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 05:59:45,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:45,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:45,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:45,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825606845] [2022-03-19 05:59:45,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:45,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897914373] [2022-03-19 05:59:45,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897914373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:45,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:45,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 05:59:45,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260036641] [2022-03-19 05:59:45,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260036641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:45,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:45,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:59:45,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122418288] [2022-03-19 05:59:45,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:45,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:59:45,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:45,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:59:45,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 05:59:45,888 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 05:59:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:45,937 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-19 05:59:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 05:59:45,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-19 05:59:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:45,938 INFO L225 Difference]: With dead ends: 43 [2022-03-19 05:59:45,938 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 05:59:45,938 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 05:59:45,939 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:45,939 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 05:59:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 05:59:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 05:59:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-19 05:59:45,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2022-03-19 05:59:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:45,948 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-19 05:59:45,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 05:59:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-19 05:59:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 05:59:45,949 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:45,949 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-19 05:59:45,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:46,163 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 [2022-03-19 05:59:46,163 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 3 times [2022-03-19 05:59:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:46,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [404883189] [2022-03-19 05:59:46,164 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 4 times [2022-03-19 05:59:46,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:46,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454835843] [2022-03-19 05:59:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:46,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:46,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149578873] [2022-03-19 05:59:46,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:59:46,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:46,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:46,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:46,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 05:59:46,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:59:46,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 05:59:46,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:46,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 05:59:46,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454835843] [2022-03-19 05:59:46,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149578873] [2022-03-19 05:59:46,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149578873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:46,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:46,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 05:59:46,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:46,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [404883189] [2022-03-19 05:59:46,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [404883189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:46,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:46,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:59:46,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058992042] [2022-03-19 05:59:46,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:46,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:59:46,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:59:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:59:46,404 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 05:59:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:46,445 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-19 05:59:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 05:59:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-19 05:59:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:46,447 INFO L225 Difference]: With dead ends: 52 [2022-03-19 05:59:46,447 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 05:59:46,447 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-19 05:59:46,448 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:46,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 05:59:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 05:59:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 05:59:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-03-19 05:59:46,463 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2022-03-19 05:59:46,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:46,464 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-03-19 05:59:46,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 05:59:46,465 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-03-19 05:59:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 05:59:46,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:46,467 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:46,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:46,696 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 [2022-03-19 05:59:46,697 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:46,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:46,697 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 5 times [2022-03-19 05:59:46,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:46,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1699780759] [2022-03-19 05:59:46,698 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 6 times [2022-03-19 05:59:46,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:46,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389947381] [2022-03-19 05:59:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:46,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:46,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:46,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106269408] [2022-03-19 05:59:46,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:59:46,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:46,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:46,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:46,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 05:59:46,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 05:59:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:46,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 05:59:46,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:46,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 05:59:47,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389947381] [2022-03-19 05:59:47,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106269408] [2022-03-19 05:59:47,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106269408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:47,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:47,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 05:59:47,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:47,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1699780759] [2022-03-19 05:59:47,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1699780759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:47,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:47,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 05:59:47,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197327611] [2022-03-19 05:59:47,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:47,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 05:59:47,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 05:59:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 05:59:47,007 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 05:59:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:47,057 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-03-19 05:59:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 05:59:47,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-19 05:59:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:47,058 INFO L225 Difference]: With dead ends: 61 [2022-03-19 05:59:47,058 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 05:59:47,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-19 05:59:47,059 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:47,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 05:59:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 05:59:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 05:59:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-19 05:59:47,065 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2022-03-19 05:59:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:47,066 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-19 05:59:47,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 05:59:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-19 05:59:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 05:59:47,066 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:47,067 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:47,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:47,273 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 [2022-03-19 05:59:47,274 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 7 times [2022-03-19 05:59:47,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:47,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810970743] [2022-03-19 05:59:47,275 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 8 times [2022-03-19 05:59:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:47,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98794491] [2022-03-19 05:59:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:47,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:47,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813071342] [2022-03-19 05:59:47,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:59:47,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:47,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:47,288 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:47,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 05:59:47,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:59:47,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:47,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 05:59:47,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:47,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 05:59:47,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98794491] [2022-03-19 05:59:47,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813071342] [2022-03-19 05:59:47,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813071342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:47,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:47,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 05:59:47,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810970743] [2022-03-19 05:59:47,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810970743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:47,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:47,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 05:59:47,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097119238] [2022-03-19 05:59:47,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:47,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 05:59:47,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:47,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 05:59:47,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 05:59:47,593 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 05:59:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:47,666 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-19 05:59:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 05:59:47,666 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), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-19 05:59:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:47,667 INFO L225 Difference]: With dead ends: 70 [2022-03-19 05:59:47,668 INFO L226 Difference]: Without dead ends: 65 [2022-03-19 05:59:47,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 05:59:47,668 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:47,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 102 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:47,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-19 05:59:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-19 05:59:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 05:59:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-03-19 05:59:47,677 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2022-03-19 05:59:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:47,678 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-03-19 05:59:47,678 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), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 05:59:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-03-19 05:59:47,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 05:59:47,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:47,679 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:47,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:47,895 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 [2022-03-19 05:59:47,895 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:47,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 9 times [2022-03-19 05:59:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846055413] [2022-03-19 05:59:47,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 10 times [2022-03-19 05:59:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496273932] [2022-03-19 05:59:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:47,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:47,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437456312] [2022-03-19 05:59:47,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:59:47,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:47,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:47,926 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:47,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 05:59:47,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:59:47,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:47,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 05:59:47,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:48,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 05:59:48,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:48,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496273932] [2022-03-19 05:59:48,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:48,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437456312] [2022-03-19 05:59:48,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437456312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:48,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:48,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 05:59:48,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846055413] [2022-03-19 05:59:48,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846055413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:48,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:48,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 05:59:48,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977271833] [2022-03-19 05:59:48,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:48,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 05:59:48,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 05:59:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:59:48,289 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 05:59:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:48,348 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-03-19 05:59:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:59:48,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-03-19 05:59:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:48,349 INFO L225 Difference]: With dead ends: 79 [2022-03-19 05:59:48,349 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 05:59:48,349 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-19 05:59:48,349 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:48,350 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 122 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 05:59:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-19 05:59:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 05:59:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-03-19 05:59:48,357 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2022-03-19 05:59:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:48,357 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-03-19 05:59:48,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 05:59:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-03-19 05:59:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 05:59:48,358 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:48,358 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:48,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:48,576 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 [2022-03-19 05:59:48,576 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 11 times [2022-03-19 05:59:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:48,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1819801188] [2022-03-19 05:59:48,577 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 12 times [2022-03-19 05:59:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:48,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498496759] [2022-03-19 05:59:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:48,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:48,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:48,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183209524] [2022-03-19 05:59:48,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:59:48,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:48,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:48,586 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:48,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 05:59:48,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 05:59:48,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 05:59:48,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:48,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 05:59:48,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:48,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498496759] [2022-03-19 05:59:48,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:48,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183209524] [2022-03-19 05:59:48,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183209524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:48,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:48,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 05:59:48,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:48,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1819801188] [2022-03-19 05:59:48,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1819801188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:48,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:48,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 05:59:48,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074215957] [2022-03-19 05:59:48,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:48,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 05:59:48,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:48,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 05:59:48,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 05:59:48,936 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 05:59:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:48,994 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-03-19 05:59:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 05:59:48,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2022-03-19 05:59:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:48,997 INFO L225 Difference]: With dead ends: 88 [2022-03-19 05:59:48,997 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 05:59:48,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-19 05:59:48,998 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:48,999 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 124 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 05:59:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-19 05:59:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 05:59:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-03-19 05:59:49,010 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2022-03-19 05:59:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:49,010 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-03-19 05:59:49,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 05:59:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-03-19 05:59:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 05:59:49,013 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:49,013 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:49,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:49,230 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 [2022-03-19 05:59:49,231 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 13 times [2022-03-19 05:59:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:49,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060161644] [2022-03-19 05:59:49,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 14 times [2022-03-19 05:59:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:49,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179947000] [2022-03-19 05:59:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:49,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:49,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224587323] [2022-03-19 05:59:49,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:59:49,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:49,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:49,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:49,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 05:59:49,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:59:49,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 05:59:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:49,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 05:59:49,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:49,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179947000] [2022-03-19 05:59:49,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:49,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224587323] [2022-03-19 05:59:49,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224587323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:49,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:49,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 05:59:49,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060161644] [2022-03-19 05:59:49,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060161644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:49,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:49,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:59:49,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887619818] [2022-03-19 05:59:49,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:49,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:59:49,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:49,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:59:49,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 05:59:49,726 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 05:59:49,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:49,817 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-19 05:59:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 05:59:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2022-03-19 05:59:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:49,818 INFO L225 Difference]: With dead ends: 97 [2022-03-19 05:59:49,818 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 05:59:49,819 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-19 05:59:49,819 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:49,819 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 132 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 05:59:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-19 05:59:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 05:59:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-03-19 05:59:49,827 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2022-03-19 05:59:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:49,827 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-03-19 05:59:49,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 05:59:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-03-19 05:59:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 05:59:49,828 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:49,828 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:49,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:50,064 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 [2022-03-19 05:59:50,064 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:50,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 15 times [2022-03-19 05:59:50,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:50,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339069351] [2022-03-19 05:59:50,065 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 16 times [2022-03-19 05:59:50,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:50,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509649737] [2022-03-19 05:59:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:50,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:50,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:50,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659920336] [2022-03-19 05:59:50,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:59:50,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:50,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:50,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:50,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 05:59:50,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:59:50,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 05:59:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:50,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 05:59:50,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509649737] [2022-03-19 05:59:50,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659920336] [2022-03-19 05:59:50,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659920336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:50,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:50,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 05:59:50,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339069351] [2022-03-19 05:59:50,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339069351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:50,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:50,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 05:59:50,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059110635] [2022-03-19 05:59:50,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:50,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 05:59:50,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 05:59:50,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 05:59:50,575 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 05:59:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:50,675 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-03-19 05:59:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 05:59:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2022-03-19 05:59:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:50,676 INFO L225 Difference]: With dead ends: 106 [2022-03-19 05:59:50,676 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 05:59:50,677 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-19 05:59:50,677 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:50,677 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 146 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:50,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 05:59:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-19 05:59:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 05:59:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-03-19 05:59:50,684 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2022-03-19 05:59:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:50,684 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-03-19 05:59:50,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 05:59:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-03-19 05:59:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-19 05:59:50,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:50,685 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:50,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:50,899 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 [2022-03-19 05:59:50,899 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:50,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 17 times [2022-03-19 05:59:50,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:50,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [183282790] [2022-03-19 05:59:50,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:50,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 18 times [2022-03-19 05:59:50,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:50,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135536818] [2022-03-19 05:59:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:50,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:50,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:50,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621480808] [2022-03-19 05:59:50,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:59:50,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:50,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:50,911 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:50,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 05:59:50,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 05:59:50,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:50,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 05:59:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:51,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 198 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-19 05:59:51,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:51,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135536818] [2022-03-19 05:59:51,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:51,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621480808] [2022-03-19 05:59:51,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621480808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:51,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:51,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 05:59:51,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [183282790] [2022-03-19 05:59:51,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [183282790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:51,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:51,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 05:59:51,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450572772] [2022-03-19 05:59:51,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:51,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 05:59:51,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 05:59:51,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 05:59:51,477 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 05:59:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:51,593 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-03-19 05:59:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 05:59:51,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2022-03-19 05:59:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:51,594 INFO L225 Difference]: With dead ends: 115 [2022-03-19 05:59:51,595 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 05:59:51,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 05:59:51,596 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:51,596 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:59:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 05:59:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-19 05:59:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 05:59:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-19 05:59:51,626 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2022-03-19 05:59:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:51,626 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-19 05:59:51,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 05:59:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-19 05:59:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 05:59:51,627 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:51,627 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:51,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:51,828 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 [2022-03-19 05:59:51,828 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 19 times [2022-03-19 05:59:51,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:51,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2127998607] [2022-03-19 05:59:51,829 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 20 times [2022-03-19 05:59:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:51,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666193925] [2022-03-19 05:59:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:51,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:51,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947906001] [2022-03-19 05:59:51,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:59:51,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:51,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:51,847 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:51,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 05:59:51,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:59:51,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:51,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 05:59:51,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:52,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 05:59:52,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:52,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666193925] [2022-03-19 05:59:52,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:52,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947906001] [2022-03-19 05:59:52,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947906001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:52,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:52,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-19 05:59:52,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:52,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2127998607] [2022-03-19 05:59:52,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2127998607] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:52,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:52,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 05:59:52,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543510678] [2022-03-19 05:59:52,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:52,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 05:59:52,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 05:59:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-19 05:59:52,524 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 05:59:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:52,641 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-03-19 05:59:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 05:59:52,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2022-03-19 05:59:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:52,643 INFO L225 Difference]: With dead ends: 124 [2022-03-19 05:59:52,643 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 05:59:52,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 05:59:52,644 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:52,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 156 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:59:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 05:59:52,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-19 05:59:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 05:59:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2022-03-19 05:59:52,660 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2022-03-19 05:59:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:52,660 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2022-03-19 05:59:52,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 05:59:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2022-03-19 05:59:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 05:59:52,661 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:52,661 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:52,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 05:59:52,879 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 [2022-03-19 05:59:52,879 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:52,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 21 times [2022-03-19 05:59:52,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:52,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1142985591] [2022-03-19 05:59:52,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:52,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 22 times [2022-03-19 05:59:52,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:52,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567466140] [2022-03-19 05:59:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:52,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:52,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:52,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511481699] [2022-03-19 05:59:52,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:59:52,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:52,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:52,916 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:52,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 05:59:52,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:59:52,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 05:59:52,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:53,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 297 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 05:59:53,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567466140] [2022-03-19 05:59:53,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511481699] [2022-03-19 05:59:53,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511481699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:53,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:53,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-19 05:59:53,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1142985591] [2022-03-19 05:59:53,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1142985591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:53,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:53,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 05:59:53,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833610401] [2022-03-19 05:59:53,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:53,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 05:59:53,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 05:59:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-19 05:59:53,426 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 05:59:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:53,600 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2022-03-19 05:59:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 05:59:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2022-03-19 05:59:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:53,601 INFO L225 Difference]: With dead ends: 133 [2022-03-19 05:59:53,601 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 05:59:53,602 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 05:59:53,602 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:53,603 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 158 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:59:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 05:59:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-19 05:59:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 05:59:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2022-03-19 05:59:53,612 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2022-03-19 05:59:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:53,613 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2022-03-19 05:59:53,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 05:59:53,613 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2022-03-19 05:59:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 05:59:53,614 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:53,614 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:53,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:53,827 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 [2022-03-19 05:59:53,827 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 23 times [2022-03-19 05:59:53,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:53,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1986179043] [2022-03-19 05:59:53,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 24 times [2022-03-19 05:59:53,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:53,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913961995] [2022-03-19 05:59:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:53,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:53,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:53,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872101189] [2022-03-19 05:59:53,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:59:53,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:53,847 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:53,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 05:59:53,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-19 05:59:53,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:53,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 05:59:53,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:54,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 354 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 05:59:54,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913961995] [2022-03-19 05:59:54,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872101189] [2022-03-19 05:59:54,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872101189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:54,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:54,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-19 05:59:54,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1986179043] [2022-03-19 05:59:54,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1986179043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:54,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:54,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 05:59:54,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97292989] [2022-03-19 05:59:54,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:54,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 05:59:54,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:54,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 05:59:54,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-19 05:59:54,637 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 05:59:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:54,847 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2022-03-19 05:59:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 05:59:54,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2022-03-19 05:59:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:54,872 INFO L225 Difference]: With dead ends: 142 [2022-03-19 05:59:54,872 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 05:59:54,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 05:59:54,875 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:54,875 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 172 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:59:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 05:59:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-19 05:59:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 05:59:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-03-19 05:59:54,884 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2022-03-19 05:59:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:54,884 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-03-19 05:59:54,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 05:59:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-03-19 05:59:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-19 05:59:54,885 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:54,885 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:54,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:55,104 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 [2022-03-19 05:59:55,104 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:55,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 25 times [2022-03-19 05:59:55,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:55,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1042942315] [2022-03-19 05:59:55,105 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:55,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 26 times [2022-03-19 05:59:55,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:55,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887648748] [2022-03-19 05:59:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:55,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:55,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:55,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742420837] [2022-03-19 05:59:55,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:59:55,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:55,121 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:55,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 05:59:55,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:59:55,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:55,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 05:59:55,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:55,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 416 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 05:59:55,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:55,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887648748] [2022-03-19 05:59:55,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:55,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742420837] [2022-03-19 05:59:55,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742420837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:55,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:55,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-19 05:59:55,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:55,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1042942315] [2022-03-19 05:59:55,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1042942315] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:55,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:55,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 05:59:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256781851] [2022-03-19 05:59:55,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:55,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 05:59:55,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:55,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 05:59:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-19 05:59:55,792 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 05:59:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:55,933 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2022-03-19 05:59:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 05:59:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2022-03-19 05:59:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:55,934 INFO L225 Difference]: With dead ends: 151 [2022-03-19 05:59:55,934 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 05:59:55,936 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 05:59:55,936 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 48 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:55,937 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 174 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:59:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 05:59:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-19 05:59:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 05:59:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2022-03-19 05:59:55,949 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2022-03-19 05:59:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:55,949 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2022-03-19 05:59:55,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 05:59:55,950 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2022-03-19 05:59:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 05:59:55,950 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:55,950 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:55,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:56,151 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 [2022-03-19 05:59:56,151 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 27 times [2022-03-19 05:59:56,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546467890] [2022-03-19 05:59:56,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 28 times [2022-03-19 05:59:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978261637] [2022-03-19 05:59:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:56,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:56,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:56,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179943641] [2022-03-19 05:59:56,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:59:56,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:56,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:56,163 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:56,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 05:59:56,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:59:56,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:56,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 05:59:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:56,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 483 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 05:59:56,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978261637] [2022-03-19 05:59:56,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179943641] [2022-03-19 05:59:56,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179943641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:56,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:56,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-19 05:59:56,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546467890] [2022-03-19 05:59:56,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546467890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:56,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:56,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 05:59:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118502256] [2022-03-19 05:59:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:56,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 05:59:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 05:59:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 05:59:56,977 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 05:59:57,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:57,159 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-03-19 05:59:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 05:59:57,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2022-03-19 05:59:57,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:57,160 INFO L225 Difference]: With dead ends: 160 [2022-03-19 05:59:57,160 INFO L226 Difference]: Without dead ends: 155 [2022-03-19 05:59:57,161 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 05:59:57,162 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 58 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:57,162 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 194 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:59:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-19 05:59:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-19 05:59:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 05:59:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2022-03-19 05:59:57,171 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2022-03-19 05:59:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:57,188 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2022-03-19 05:59:57,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 05:59:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2022-03-19 05:59:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-19 05:59:57,190 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:57,190 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:57,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:57,390 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 [2022-03-19 05:59:57,391 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 29 times [2022-03-19 05:59:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:57,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1632146904] [2022-03-19 05:59:57,392 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 30 times [2022-03-19 05:59:57,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:57,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139529334] [2022-03-19 05:59:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:57,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:57,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056997624] [2022-03-19 05:59:57,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:59:57,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:57,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:57,409 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:57,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 05:59:57,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-19 05:59:57,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:57,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 05:59:57,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:57,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 555 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 05:59:58,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:58,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139529334] [2022-03-19 05:59:58,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056997624] [2022-03-19 05:59:58,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056997624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:58,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:58,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-19 05:59:58,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1632146904] [2022-03-19 05:59:58,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1632146904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:58,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:58,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 05:59:58,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344995053] [2022-03-19 05:59:58,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:58,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 05:59:58,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:58,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 05:59:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 05:59:58,232 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 05:59:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:58,421 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-03-19 05:59:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 05:59:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2022-03-19 05:59:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:58,423 INFO L225 Difference]: With dead ends: 169 [2022-03-19 05:59:58,424 INFO L226 Difference]: Without dead ends: 164 [2022-03-19 05:59:58,425 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 05:59:58,425 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:58,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 208 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:59:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-19 05:59:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-03-19 05:59:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 05:59:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2022-03-19 05:59:58,434 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2022-03-19 05:59:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:58,434 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2022-03-19 05:59:58,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 05:59:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2022-03-19 05:59:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 05:59:58,435 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:58,435 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:58,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 05:59:58,652 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 [2022-03-19 05:59:58,653 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:59:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:59:58,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 31 times [2022-03-19 05:59:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:58,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408749123] [2022-03-19 05:59:58,653 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:59:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 32 times [2022-03-19 05:59:58,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:59:58,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936776257] [2022-03-19 05:59:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:59:58,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:59:58,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:59:58,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076422753] [2022-03-19 05:59:58,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:59:58,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:59:58,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:59:58,662 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:59:58,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 05:59:58,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:59:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:59:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 05:59:58,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:59:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:59:59,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:59:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 632 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 05:59:59,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:59:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936776257] [2022-03-19 05:59:59,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:59:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076422753] [2022-03-19 05:59:59,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076422753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:59:59,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:59:59,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-19 05:59:59,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:59:59,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408749123] [2022-03-19 05:59:59,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408749123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:59:59,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:59:59,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 05:59:59,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116848854] [2022-03-19 05:59:59,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:59:59,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 05:59:59,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:59:59,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 05:59:59,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 05:59:59,654 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 05:59:59,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:59:59,877 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2022-03-19 05:59:59,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 05:59:59,877 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2022-03-19 05:59:59,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:59:59,878 INFO L225 Difference]: With dead ends: 178 [2022-03-19 05:59:59,878 INFO L226 Difference]: Without dead ends: 173 [2022-03-19 05:59:59,879 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 05:59:59,880 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:59:59,880 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 228 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:59:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-19 05:59:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-19 05:59:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-19 05:59:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2022-03-19 05:59:59,916 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2022-03-19 05:59:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:59:59,917 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2022-03-19 05:59:59,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 05:59:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2022-03-19 05:59:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-19 05:59:59,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:59:59,919 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:59:59,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:00,130 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 [2022-03-19 06:00:00,131 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:00,131 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 33 times [2022-03-19 06:00:00,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:00,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [422208325] [2022-03-19 06:00:00,132 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 34 times [2022-03-19 06:00:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:00,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294956775] [2022-03-19 06:00:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:00,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:00,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:00,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453291409] [2022-03-19 06:00:00,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:00:00,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:00,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:00,146 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:00,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 06:00:00,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:00:00,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 06:00:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:00,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 714 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 06:00:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294956775] [2022-03-19 06:00:01,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453291409] [2022-03-19 06:00:01,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453291409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:01,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:01,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-19 06:00:01,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:01,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [422208325] [2022-03-19 06:00:01,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [422208325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:01,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:01,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:00:01,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44244144] [2022-03-19 06:00:01,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:01,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 06:00:01,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 06:00:01,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 06:00:01,052 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 06:00:01,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:01,262 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2022-03-19 06:00:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 06:00:01,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2022-03-19 06:00:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:01,263 INFO L225 Difference]: With dead ends: 187 [2022-03-19 06:00:01,263 INFO L226 Difference]: Without dead ends: 182 [2022-03-19 06:00:01,264 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 06:00:01,264 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 51 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:01,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 224 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-19 06:00:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-19 06:00:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 06:00:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2022-03-19 06:00:01,275 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2022-03-19 06:00:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:01,275 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2022-03-19 06:00:01,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 06:00:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2022-03-19 06:00:01,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-19 06:00:01,276 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:01,276 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:01,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:01,477 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 [2022-03-19 06:00:01,477 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:01,477 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 35 times [2022-03-19 06:00:01,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:01,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [814873778] [2022-03-19 06:00:01,478 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 36 times [2022-03-19 06:00:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:01,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473812575] [2022-03-19 06:00:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:01,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:01,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:01,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929359751] [2022-03-19 06:00:01,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:00:01,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:01,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:01,486 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:01,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 06:00:01,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-19 06:00:01,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 06:00:01,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:02,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 801 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 06:00:02,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473812575] [2022-03-19 06:00:02,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929359751] [2022-03-19 06:00:02,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929359751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:02,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:02,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-19 06:00:02,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [814873778] [2022-03-19 06:00:02,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [814873778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:02,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:02,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 06:00:02,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909548824] [2022-03-19 06:00:02,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:02,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 06:00:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 06:00:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 06:00:02,730 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 06:00:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:02,980 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-03-19 06:00:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 06:00:02,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2022-03-19 06:00:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:02,981 INFO L225 Difference]: With dead ends: 196 [2022-03-19 06:00:02,981 INFO L226 Difference]: Without dead ends: 191 [2022-03-19 06:00:02,982 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 06:00:02,983 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:02,983 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 220 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-19 06:00:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-19 06:00:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 06:00:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2022-03-19 06:00:02,992 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2022-03-19 06:00:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:02,992 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2022-03-19 06:00:02,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 06:00:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2022-03-19 06:00:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-19 06:00:02,993 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:02,993 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:03,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 06:00:03,194 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 [2022-03-19 06:00:03,194 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 37 times [2022-03-19 06:00:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:03,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368046522] [2022-03-19 06:00:03,195 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:03,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 38 times [2022-03-19 06:00:03,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:03,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735055956] [2022-03-19 06:00:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:03,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:03,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:03,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205524052] [2022-03-19 06:00:03,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:00:03,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:03,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:03,213 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:03,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 06:00:03,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:00:03,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 06:00:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:03,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 893 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 06:00:04,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:04,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735055956] [2022-03-19 06:00:04,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:04,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205524052] [2022-03-19 06:00:04,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205524052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:04,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:04,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-19 06:00:04,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368046522] [2022-03-19 06:00:04,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368046522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:04,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:04,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 06:00:04,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701263379] [2022-03-19 06:00:04,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:04,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 06:00:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 06:00:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 06:00:04,354 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 06:00:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:04,585 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2022-03-19 06:00:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 06:00:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2022-03-19 06:00:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:04,586 INFO L225 Difference]: With dead ends: 205 [2022-03-19 06:00:04,587 INFO L226 Difference]: Without dead ends: 200 [2022-03-19 06:00:04,588 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 06:00:04,591 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 66 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:04,592 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 234 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-19 06:00:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-03-19 06:00:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 06:00:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2022-03-19 06:00:04,621 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2022-03-19 06:00:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:04,621 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2022-03-19 06:00:04,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 06:00:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2022-03-19 06:00:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-19 06:00:04,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:04,623 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:04,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-19 06:00:04,830 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 [2022-03-19 06:00:04,830 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 39 times [2022-03-19 06:00:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:04,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304499633] [2022-03-19 06:00:04,831 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 40 times [2022-03-19 06:00:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:04,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282753910] [2022-03-19 06:00:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:04,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:04,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:04,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416580062] [2022-03-19 06:00:04,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:00:04,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:04,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:04,841 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:04,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 06:00:04,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:00:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:04,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 06:00:04,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 1750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:05,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 990 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-19 06:00:05,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:05,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282753910] [2022-03-19 06:00:05,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416580062] [2022-03-19 06:00:05,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416580062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:05,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:05,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-19 06:00:05,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304499633] [2022-03-19 06:00:05,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304499633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:05,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:05,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 06:00:05,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575408267] [2022-03-19 06:00:05,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:05,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 06:00:05,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 06:00:05,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 06:00:05,958 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 06:00:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:06,198 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-03-19 06:00:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 06:00:06,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 203 [2022-03-19 06:00:06,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:06,201 INFO L225 Difference]: With dead ends: 214 [2022-03-19 06:00:06,201 INFO L226 Difference]: Without dead ends: 209 [2022-03-19 06:00:06,202 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 06:00:06,203 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 92 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:06,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 224 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-19 06:00:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-19 06:00:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 159 states have internal predecessors, (181), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 06:00:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2022-03-19 06:00:06,217 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 203 [2022-03-19 06:00:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:06,218 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2022-03-19 06:00:06,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 06:00:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2022-03-19 06:00:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-19 06:00:06,219 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:06,219 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:06,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:06,432 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 [2022-03-19 06:00:06,432 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:06,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 41 times [2022-03-19 06:00:06,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:06,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [626322752] [2022-03-19 06:00:06,433 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:06,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 42 times [2022-03-19 06:00:06,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:06,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37985217] [2022-03-19 06:00:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:06,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:06,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:06,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829386054] [2022-03-19 06:00:06,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:00:06,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:06,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:06,451 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:06,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 06:00:06,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-19 06:00:06,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:06,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 06:00:06,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1932 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:07,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1092 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-19 06:00:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:08,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37985217] [2022-03-19 06:00:08,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:08,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829386054] [2022-03-19 06:00:08,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829386054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:08,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:08,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-19 06:00:08,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:08,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [626322752] [2022-03-19 06:00:08,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [626322752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:08,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:08,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 06:00:08,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307643572] [2022-03-19 06:00:08,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:08,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 06:00:08,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:08,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 06:00:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 06:00:08,056 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 06:00:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:08,444 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2022-03-19 06:00:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 06:00:08,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 212 [2022-03-19 06:00:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:08,446 INFO L225 Difference]: With dead ends: 223 [2022-03-19 06:00:08,446 INFO L226 Difference]: Without dead ends: 218 [2022-03-19 06:00:08,447 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 06:00:08,447 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 122 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:08,448 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 238 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-19 06:00:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-19 06:00:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 06:00:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-03-19 06:00:08,462 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 212 [2022-03-19 06:00:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:08,462 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-03-19 06:00:08,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 06:00:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-03-19 06:00:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-19 06:00:08,464 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:08,464 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:08,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:08,683 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 [2022-03-19 06:00:08,683 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:08,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:08,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 43 times [2022-03-19 06:00:08,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:08,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725305189] [2022-03-19 06:00:08,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:08,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 44 times [2022-03-19 06:00:08,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:08,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558663064] [2022-03-19 06:00:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:08,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:08,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:08,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42458945] [2022-03-19 06:00:08,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:00:08,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:08,717 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) [2022-03-19 06:00:08,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 06:00:08,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:00:08,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 06:00:08,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:09,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-19 06:00:10,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558663064] [2022-03-19 06:00:10,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42458945] [2022-03-19 06:00:10,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42458945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:10,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:10,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-19 06:00:10,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [725305189] [2022-03-19 06:00:10,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [725305189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:10,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:10,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 06:00:10,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964239585] [2022-03-19 06:00:10,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:10,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 06:00:10,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:10,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 06:00:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 06:00:10,355 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-19 06:00:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:10,802 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2022-03-19 06:00:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 06:00:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 221 [2022-03-19 06:00:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:10,804 INFO L225 Difference]: With dead ends: 232 [2022-03-19 06:00:10,804 INFO L226 Difference]: Without dead ends: 227 [2022-03-19 06:00:10,806 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 06:00:10,807 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 68 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:10,808 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 264 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-19 06:00:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-19 06:00:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 173 states have (on average 1.138728323699422) internal successors, (197), 173 states have internal predecessors, (197), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 06:00:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 251 transitions. [2022-03-19 06:00:10,838 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 251 transitions. Word has length 221 [2022-03-19 06:00:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:10,838 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 251 transitions. [2022-03-19 06:00:10,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-19 06:00:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 251 transitions. [2022-03-19 06:00:10,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-03-19 06:00:10,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:10,840 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:10,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:11,063 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 [2022-03-19 06:00:11,064 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 45 times [2022-03-19 06:00:11,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:11,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1245463566] [2022-03-19 06:00:11,065 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:11,065 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 46 times [2022-03-19 06:00:11,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:11,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593560163] [2022-03-19 06:00:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:11,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:11,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:11,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489511279] [2022-03-19 06:00:11,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:00:11,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:11,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:11,077 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) [2022-03-19 06:00:11,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 06:00:11,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:00:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 06:00:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 2323 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:11,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 1311 refuted. 0 times theorem prover too weak. 1016 trivial. 0 not checked. [2022-03-19 06:00:12,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:12,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593560163] [2022-03-19 06:00:12,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:12,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489511279] [2022-03-19 06:00:12,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489511279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:12,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:12,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-19 06:00:12,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1245463566] [2022-03-19 06:00:12,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1245463566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:12,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:12,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 06:00:12,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090478945] [2022-03-19 06:00:12,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:12,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 06:00:12,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 06:00:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 06:00:12,763 INFO L87 Difference]: Start difference. First operand 227 states and 251 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-19 06:00:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:13,180 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2022-03-19 06:00:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 06:00:13,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) Word has length 230 [2022-03-19 06:00:13,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:13,182 INFO L225 Difference]: With dead ends: 241 [2022-03-19 06:00:13,182 INFO L226 Difference]: Without dead ends: 236 [2022-03-19 06:00:13,183 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 06:00:13,184 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 73 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:13,184 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 284 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-19 06:00:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-03-19 06:00:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 180 states have internal predecessors, (205), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 06:00:13,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2022-03-19 06:00:13,224 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 230 [2022-03-19 06:00:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:13,225 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2022-03-19 06:00:13,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-19 06:00:13,225 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2022-03-19 06:00:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-19 06:00:13,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:13,226 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:13,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:13,440 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 [2022-03-19 06:00:13,440 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 47 times [2022-03-19 06:00:13,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:13,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048121748] [2022-03-19 06:00:13,441 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:13,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 48 times [2022-03-19 06:00:13,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:13,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866350128] [2022-03-19 06:00:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:13,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:13,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:13,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814199178] [2022-03-19 06:00:13,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:00:13,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:13,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:13,452 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) [2022-03-19 06:00:13,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 06:00:13,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-19 06:00:13,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:13,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 06:00:13,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 2532 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:14,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 1428 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-19 06:00:15,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866350128] [2022-03-19 06:00:15,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814199178] [2022-03-19 06:00:15,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814199178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:15,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:15,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-19 06:00:15,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048121748] [2022-03-19 06:00:15,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048121748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:15,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:15,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 06:00:15,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132204665] [2022-03-19 06:00:15,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:15,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 06:00:15,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 06:00:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:15,149 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-19 06:00:15,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:15,514 INFO L93 Difference]: Finished difference Result 250 states and 276 transitions. [2022-03-19 06:00:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 06:00:15,514 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) Word has length 239 [2022-03-19 06:00:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:15,516 INFO L225 Difference]: With dead ends: 250 [2022-03-19 06:00:15,516 INFO L226 Difference]: Without dead ends: 245 [2022-03-19 06:00:15,517 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 06:00:15,519 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 68 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:15,519 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 280 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-19 06:00:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-03-19 06:00:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-19 06:00:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2022-03-19 06:00:15,532 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 239 [2022-03-19 06:00:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:15,533 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2022-03-19 06:00:15,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-19 06:00:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2022-03-19 06:00:15,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-19 06:00:15,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:15,538 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:15,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-19 06:00:15,751 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 [2022-03-19 06:00:15,751 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:15,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:15,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 49 times [2022-03-19 06:00:15,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:15,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [415237873] [2022-03-19 06:00:15,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:15,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 50 times [2022-03-19 06:00:15,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:15,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642541072] [2022-03-19 06:00:15,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:15,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:15,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:15,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397362433] [2022-03-19 06:00:15,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:00:15,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:15,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:15,768 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) [2022-03-19 06:00:15,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 06:00:15,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:00:15,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 06:00:15,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 2750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:16,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 1550 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2022-03-19 06:00:17,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642541072] [2022-03-19 06:00:17,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397362433] [2022-03-19 06:00:17,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397362433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:17,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:17,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2022-03-19 06:00:17,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [415237873] [2022-03-19 06:00:17,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [415237873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:17,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:17,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 06:00:17,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927735487] [2022-03-19 06:00:17,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:17,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 06:00:17,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 06:00:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:17,473 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-19 06:00:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:17,983 INFO L93 Difference]: Finished difference Result 259 states and 286 transitions. [2022-03-19 06:00:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 06:00:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) Word has length 248 [2022-03-19 06:00:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:17,984 INFO L225 Difference]: With dead ends: 259 [2022-03-19 06:00:17,984 INFO L226 Difference]: Without dead ends: 254 [2022-03-19 06:00:17,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2656, Invalid=3506, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 06:00:17,990 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 109 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:17,990 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 288 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-19 06:00:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-19 06:00:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 194 states have internal predecessors, (221), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 06:00:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2022-03-19 06:00:18,004 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 248 [2022-03-19 06:00:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:18,004 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2022-03-19 06:00:18,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-19 06:00:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2022-03-19 06:00:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-19 06:00:18,005 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:18,005 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:18,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:18,223 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 [2022-03-19 06:00:18,224 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 51 times [2022-03-19 06:00:18,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:18,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755364740] [2022-03-19 06:00:18,225 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:18,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 52 times [2022-03-19 06:00:18,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:18,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443594512] [2022-03-19 06:00:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:18,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:18,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:18,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971087451] [2022-03-19 06:00:18,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:00:18,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:18,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:18,255 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) [2022-03-19 06:00:18,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 06:00:18,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:00:18,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:18,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 06:00:18,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 2977 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:19,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 1677 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2022-03-19 06:00:20,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443594512] [2022-03-19 06:00:20,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971087451] [2022-03-19 06:00:20,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971087451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:20,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:20,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 54 [2022-03-19 06:00:20,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:20,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755364740] [2022-03-19 06:00:20,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755364740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:20,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:20,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 06:00:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488877928] [2022-03-19 06:00:20,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:20,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 06:00:20,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:20,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 06:00:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:20,339 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-19 06:00:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:20,926 INFO L93 Difference]: Finished difference Result 268 states and 296 transitions. [2022-03-19 06:00:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 06:00:20,927 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) Word has length 257 [2022-03-19 06:00:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:20,929 INFO L225 Difference]: With dead ends: 268 [2022-03-19 06:00:20,929 INFO L226 Difference]: Without dead ends: 263 [2022-03-19 06:00:20,930 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 460 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2709, Invalid=3611, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 06:00:20,931 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 80 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:20,931 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 290 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:00:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-19 06:00:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-19 06:00:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 06:00:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-19 06:00:20,979 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 257 [2022-03-19 06:00:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:20,980 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-19 06:00:20,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-19 06:00:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-19 06:00:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-03-19 06:00:20,981 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:20,995 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:21,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:21,211 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 [2022-03-19 06:00:21,212 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 53 times [2022-03-19 06:00:21,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:21,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1962989686] [2022-03-19 06:00:21,213 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 54 times [2022-03-19 06:00:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:21,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854511868] [2022-03-19 06:00:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:21,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:21,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:21,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788821214] [2022-03-19 06:00:21,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:00:21,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:21,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:21,255 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) [2022-03-19 06:00:21,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 06:00:21,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-19 06:00:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 06:00:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 3213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:22,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 1809 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-19 06:00:23,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:23,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854511868] [2022-03-19 06:00:23,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:23,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788821214] [2022-03-19 06:00:23,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788821214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:23,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:23,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 54 [2022-03-19 06:00:23,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:23,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1962989686] [2022-03-19 06:00:23,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1962989686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:23,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:23,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 06:00:23,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827523873] [2022-03-19 06:00:23,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:23,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 06:00:23,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 06:00:23,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:23,526 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-19 06:00:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:24,010 INFO L93 Difference]: Finished difference Result 277 states and 306 transitions. [2022-03-19 06:00:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 06:00:24,019 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) Word has length 266 [2022-03-19 06:00:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:24,021 INFO L225 Difference]: With dead ends: 277 [2022-03-19 06:00:24,021 INFO L226 Difference]: Without dead ends: 272 [2022-03-19 06:00:24,023 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 478 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2762, Invalid=3718, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 06:00:24,024 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 98 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:24,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 298 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:24,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-19 06:00:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-03-19 06:00:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 208 states have internal predecessors, (237), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 06:00:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2022-03-19 06:00:24,041 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 266 [2022-03-19 06:00:24,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:24,041 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2022-03-19 06:00:24,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-19 06:00:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2022-03-19 06:00:24,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-19 06:00:24,043 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:24,043 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:24,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:24,256 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 [2022-03-19 06:00:24,256 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:24,257 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 55 times [2022-03-19 06:00:24,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:24,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1980880061] [2022-03-19 06:00:24,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:24,257 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 56 times [2022-03-19 06:00:24,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:24,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81185379] [2022-03-19 06:00:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:24,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:24,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619870445] [2022-03-19 06:00:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:00:24,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:24,269 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) [2022-03-19 06:00:24,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 06:00:24,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:00:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:24,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 06:00:24,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 3458 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:25,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 1946 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-03-19 06:00:26,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:26,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81185379] [2022-03-19 06:00:26,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:26,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619870445] [2022-03-19 06:00:26,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619870445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:26,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:26,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 54 [2022-03-19 06:00:26,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:26,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1980880061] [2022-03-19 06:00:26,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1980880061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:26,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:26,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 06:00:26,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904249840] [2022-03-19 06:00:26,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:26,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 06:00:26,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 06:00:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:26,009 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-19 06:00:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:26,561 INFO L93 Difference]: Finished difference Result 286 states and 316 transitions. [2022-03-19 06:00:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-19 06:00:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) Word has length 275 [2022-03-19 06:00:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:26,562 INFO L225 Difference]: With dead ends: 286 [2022-03-19 06:00:26,563 INFO L226 Difference]: Without dead ends: 281 [2022-03-19 06:00:26,564 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2815, Invalid=3827, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 06:00:26,564 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 82 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:26,564 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 312 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-19 06:00:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-19 06:00:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 215 states have internal predecessors, (245), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 06:00:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2022-03-19 06:00:26,580 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 275 [2022-03-19 06:00:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:26,580 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2022-03-19 06:00:26,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-19 06:00:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2022-03-19 06:00:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-03-19 06:00:26,582 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:26,582 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:26,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:26,799 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 [2022-03-19 06:00:26,799 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:26,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 57 times [2022-03-19 06:00:26,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:26,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488551879] [2022-03-19 06:00:26,800 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 58 times [2022-03-19 06:00:26,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:26,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725375966] [2022-03-19 06:00:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:26,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:26,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:26,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2147018708] [2022-03-19 06:00:26,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:00:26,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:26,811 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) [2022-03-19 06:00:26,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 06:00:26,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:00:26,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 06:00:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 3712 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:27,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 2088 refuted. 0 times theorem prover too weak. 1628 trivial. 0 not checked. [2022-03-19 06:00:28,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725375966] [2022-03-19 06:00:28,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147018708] [2022-03-19 06:00:28,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147018708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:28,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:28,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 54 [2022-03-19 06:00:28,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:28,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488551879] [2022-03-19 06:00:28,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488551879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:28,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:28,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 06:00:28,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317248823] [2022-03-19 06:00:28,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:28,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 06:00:28,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:28,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 06:00:28,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:28,482 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-19 06:00:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:29,030 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2022-03-19 06:00:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 06:00:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) Word has length 284 [2022-03-19 06:00:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:29,032 INFO L225 Difference]: With dead ends: 295 [2022-03-19 06:00:29,032 INFO L226 Difference]: Without dead ends: 290 [2022-03-19 06:00:29,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 514 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2868, Invalid=3938, Unknown=0, NotChecked=0, Total=6806 [2022-03-19 06:00:29,033 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 108 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:29,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 320 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:00:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-19 06:00:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-03-19 06:00:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 222 states have internal predecessors, (253), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 06:00:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2022-03-19 06:00:29,047 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 284 [2022-03-19 06:00:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:29,047 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2022-03-19 06:00:29,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-19 06:00:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2022-03-19 06:00:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-19 06:00:29,049 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:29,049 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:29,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:29,266 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 [2022-03-19 06:00:29,267 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:29,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:29,267 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 59 times [2022-03-19 06:00:29,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:29,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1235633768] [2022-03-19 06:00:29,267 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 60 times [2022-03-19 06:00:29,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:29,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195548119] [2022-03-19 06:00:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:29,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:29,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:29,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854962159] [2022-03-19 06:00:29,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:00:29,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:29,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:29,290 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) [2022-03-19 06:00:29,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 06:00:29,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-19 06:00:29,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:29,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 06:00:29,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 3975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:30,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 2235 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-19 06:00:30,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195548119] [2022-03-19 06:00:30,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:30,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854962159] [2022-03-19 06:00:30,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854962159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:30,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:30,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2022-03-19 06:00:30,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:30,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1235633768] [2022-03-19 06:00:30,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1235633768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:30,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:30,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 06:00:30,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361031832] [2022-03-19 06:00:30,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:30,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 06:00:30,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 06:00:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:30,804 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-19 06:00:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:31,342 INFO L93 Difference]: Finished difference Result 304 states and 336 transitions. [2022-03-19 06:00:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 06:00:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) Word has length 293 [2022-03-19 06:00:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:31,343 INFO L225 Difference]: With dead ends: 304 [2022-03-19 06:00:31,343 INFO L226 Difference]: Without dead ends: 299 [2022-03-19 06:00:31,345 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 532 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2921, Invalid=4051, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 06:00:31,345 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 104 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:31,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 334 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-19 06:00:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-03-19 06:00:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 229 states have internal predecessors, (261), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 06:00:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 331 transitions. [2022-03-19 06:00:31,373 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 331 transitions. Word has length 293 [2022-03-19 06:00:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:31,374 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 331 transitions. [2022-03-19 06:00:31,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-19 06:00:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 331 transitions. [2022-03-19 06:00:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-19 06:00:31,375 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:31,375 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:31,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:31,591 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 [2022-03-19 06:00:31,591 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:31,591 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 61 times [2022-03-19 06:00:31,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:31,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [380476456] [2022-03-19 06:00:31,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 62 times [2022-03-19 06:00:31,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:31,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585456980] [2022-03-19 06:00:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:31,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:31,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:31,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107805070] [2022-03-19 06:00:31,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:00:31,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:31,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:31,603 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) [2022-03-19 06:00:31,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 06:00:31,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:00:31,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:31,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 06:00:31,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 4247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:32,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 2387 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2022-03-19 06:00:33,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:33,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585456980] [2022-03-19 06:00:33,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:33,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107805070] [2022-03-19 06:00:33,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107805070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:33,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:33,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 54 [2022-03-19 06:00:33,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:33,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [380476456] [2022-03-19 06:00:33,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [380476456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:33,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:33,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 06:00:33,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159633399] [2022-03-19 06:00:33,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:33,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 06:00:33,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:33,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 06:00:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:33,358 INFO L87 Difference]: Start difference. First operand 299 states and 331 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-19 06:00:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:33,819 INFO L93 Difference]: Finished difference Result 313 states and 346 transitions. [2022-03-19 06:00:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 06:00:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) Word has length 302 [2022-03-19 06:00:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:33,820 INFO L225 Difference]: With dead ends: 313 [2022-03-19 06:00:33,820 INFO L226 Difference]: Without dead ends: 308 [2022-03-19 06:00:33,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 550 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2974, Invalid=4166, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 06:00:33,821 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 101 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:33,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 342 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-19 06:00:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-03-19 06:00:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.1398305084745763) internal successors, (269), 236 states have internal predecessors, (269), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 06:00:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 341 transitions. [2022-03-19 06:00:33,837 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 341 transitions. Word has length 302 [2022-03-19 06:00:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:33,837 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 341 transitions. [2022-03-19 06:00:33,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-19 06:00:33,837 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 341 transitions. [2022-03-19 06:00:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-19 06:00:33,838 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:33,838 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:33,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-19 06:00:34,055 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 [2022-03-19 06:00:34,056 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 63 times [2022-03-19 06:00:34,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:34,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [317876648] [2022-03-19 06:00:34,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 64 times [2022-03-19 06:00:34,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:34,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304639543] [2022-03-19 06:00:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:34,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:34,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:34,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595853283] [2022-03-19 06:00:34,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:00:34,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:34,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:34,065 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:34,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 06:00:34,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:00:34,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 06:00:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 4528 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:35,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 2544 refuted. 0 times theorem prover too weak. 1988 trivial. 0 not checked. [2022-03-19 06:00:35,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304639543] [2022-03-19 06:00:35,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595853283] [2022-03-19 06:00:35,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595853283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:35,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:35,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 54 [2022-03-19 06:00:35,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [317876648] [2022-03-19 06:00:35,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [317876648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:35,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:35,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 06:00:35,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486720630] [2022-03-19 06:00:35,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:35,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 06:00:35,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:35,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 06:00:35,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:35,935 INFO L87 Difference]: Start difference. First operand 308 states and 341 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-19 06:00:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:36,538 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-03-19 06:00:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 06:00:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) Word has length 311 [2022-03-19 06:00:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:36,540 INFO L225 Difference]: With dead ends: 322 [2022-03-19 06:00:36,540 INFO L226 Difference]: Without dead ends: 317 [2022-03-19 06:00:36,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 568 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3027, Invalid=4283, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 06:00:36,541 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 140 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:36,541 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 332 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:00:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-19 06:00:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-03-19 06:00:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 243 states have (on average 1.139917695473251) internal successors, (277), 243 states have internal predecessors, (277), 38 states have call successors, (38), 37 states have call predecessors, (38), 35 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 06:00:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 351 transitions. [2022-03-19 06:00:36,576 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 351 transitions. Word has length 311 [2022-03-19 06:00:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:36,576 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 351 transitions. [2022-03-19 06:00:36,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-19 06:00:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 351 transitions. [2022-03-19 06:00:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-19 06:00:36,585 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:36,585 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:36,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:36,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 06:00:36,799 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 65 times [2022-03-19 06:00:36,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:36,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [772721681] [2022-03-19 06:00:36,800 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 66 times [2022-03-19 06:00:36,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:36,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867750600] [2022-03-19 06:00:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:36,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:36,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:36,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330322177] [2022-03-19 06:00:36,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:00:36,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:36,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:36,809 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:36,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 06:00:37,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-19 06:00:37,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:37,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 06:00:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 4818 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:37,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 2706 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-19 06:00:38,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:38,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867750600] [2022-03-19 06:00:38,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:38,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330322177] [2022-03-19 06:00:38,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330322177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:38,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:38,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2022-03-19 06:00:38,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:38,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [772721681] [2022-03-19 06:00:38,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [772721681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:38,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:38,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 06:00:38,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830908241] [2022-03-19 06:00:38,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:38,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 06:00:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 06:00:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:38,782 INFO L87 Difference]: Start difference. First operand 317 states and 351 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-19 06:00:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:39,283 INFO L93 Difference]: Finished difference Result 331 states and 366 transitions. [2022-03-19 06:00:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-19 06:00:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) Word has length 320 [2022-03-19 06:00:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:39,291 INFO L225 Difference]: With dead ends: 331 [2022-03-19 06:00:39,291 INFO L226 Difference]: Without dead ends: 326 [2022-03-19 06:00:39,292 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3080, Invalid=4402, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 06:00:39,292 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 120 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:39,293 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 340 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-19 06:00:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-03-19 06:00:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 250 states have (on average 1.14) internal successors, (285), 250 states have internal predecessors, (285), 39 states have call successors, (39), 38 states have call predecessors, (39), 36 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 06:00:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 361 transitions. [2022-03-19 06:00:39,324 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 361 transitions. Word has length 320 [2022-03-19 06:00:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:39,324 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 361 transitions. [2022-03-19 06:00:39,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-19 06:00:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 361 transitions. [2022-03-19 06:00:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-03-19 06:00:39,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:39,326 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:39,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:39,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:39,540 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:39,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 67 times [2022-03-19 06:00:39,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:39,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336928604] [2022-03-19 06:00:39,541 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 68 times [2022-03-19 06:00:39,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:39,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257820153] [2022-03-19 06:00:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:39,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:39,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991542826] [2022-03-19 06:00:39,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:00:39,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:39,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:39,553 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:39,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 06:00:39,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:00:39,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:39,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-19 06:00:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 5117 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:40,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 2873 refuted. 0 times theorem prover too weak. 2248 trivial. 0 not checked. [2022-03-19 06:00:41,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257820153] [2022-03-19 06:00:41,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991542826] [2022-03-19 06:00:41,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991542826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:41,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:41,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 54 [2022-03-19 06:00:41,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:41,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336928604] [2022-03-19 06:00:41,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336928604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:41,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:41,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 06:00:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852442452] [2022-03-19 06:00:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:41,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 06:00:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:41,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 06:00:41,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:41,282 INFO L87 Difference]: Start difference. First operand 326 states and 361 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-19 06:00:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:42,089 INFO L93 Difference]: Finished difference Result 340 states and 376 transitions. [2022-03-19 06:00:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 06:00:42,090 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) Word has length 329 [2022-03-19 06:00:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:42,092 INFO L225 Difference]: With dead ends: 340 [2022-03-19 06:00:42,092 INFO L226 Difference]: Without dead ends: 335 [2022-03-19 06:00:42,094 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 604 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3133, Invalid=4523, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 06:00:42,098 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 181 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:42,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 336 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:00:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-19 06:00:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-03-19 06:00:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 257 states have (on average 1.140077821011673) internal successors, (293), 257 states have internal predecessors, (293), 40 states have call successors, (40), 39 states have call predecessors, (40), 37 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-19 06:00:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 371 transitions. [2022-03-19 06:00:42,153 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 371 transitions. Word has length 329 [2022-03-19 06:00:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:42,153 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 371 transitions. [2022-03-19 06:00:42,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-19 06:00:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 371 transitions. [2022-03-19 06:00:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-03-19 06:00:42,155 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:42,155 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:42,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:42,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 06:00:42,384 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:42,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 69 times [2022-03-19 06:00:42,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:42,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569444490] [2022-03-19 06:00:42,385 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:42,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 70 times [2022-03-19 06:00:42,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:42,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059873472] [2022-03-19 06:00:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:42,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:42,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:42,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912792420] [2022-03-19 06:00:42,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:00:42,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:42,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:42,411 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:42,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 06:00:42,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:00:42,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:42,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 06:00:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 5425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:44,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 3045 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2022-03-19 06:00:45,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:45,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059873472] [2022-03-19 06:00:45,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:45,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912792420] [2022-03-19 06:00:45,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912792420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:45,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:45,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 54 [2022-03-19 06:00:45,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569444490] [2022-03-19 06:00:45,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569444490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:45,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:45,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 06:00:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510237089] [2022-03-19 06:00:45,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:45,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 06:00:45,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:45,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 06:00:45,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:45,138 INFO L87 Difference]: Start difference. First operand 335 states and 371 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-19 06:00:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:45,985 INFO L93 Difference]: Finished difference Result 349 states and 386 transitions. [2022-03-19 06:00:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-19 06:00:45,986 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) Word has length 338 [2022-03-19 06:00:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:45,988 INFO L225 Difference]: With dead ends: 349 [2022-03-19 06:00:45,988 INFO L226 Difference]: Without dead ends: 344 [2022-03-19 06:00:45,989 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 622 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3186, Invalid=4646, Unknown=0, NotChecked=0, Total=7832 [2022-03-19 06:00:45,989 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 139 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:45,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 350 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:00:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-19 06:00:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-03-19 06:00:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 264 states have (on average 1.1401515151515151) internal successors, (301), 264 states have internal predecessors, (301), 41 states have call successors, (41), 40 states have call predecessors, (41), 38 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-19 06:00:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 381 transitions. [2022-03-19 06:00:46,022 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 381 transitions. Word has length 338 [2022-03-19 06:00:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:46,022 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 381 transitions. [2022-03-19 06:00:46,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-19 06:00:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 381 transitions. [2022-03-19 06:00:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-03-19 06:00:46,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:46,024 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:46,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:46,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 06:00:46,242 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:46,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 71 times [2022-03-19 06:00:46,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:46,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [551959641] [2022-03-19 06:00:46,243 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 72 times [2022-03-19 06:00:46,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:46,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270088366] [2022-03-19 06:00:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:46,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:46,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:46,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387430011] [2022-03-19 06:00:46,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:00:46,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:46,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:46,255 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:46,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 06:00:46,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-19 06:00:46,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:46,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 06:00:46,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 5742 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:47,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 3222 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-03-19 06:00:48,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:48,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270088366] [2022-03-19 06:00:48,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:48,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387430011] [2022-03-19 06:00:48,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387430011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:48,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:48,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 54 [2022-03-19 06:00:48,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [551959641] [2022-03-19 06:00:48,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [551959641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:48,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:48,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 06:00:48,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915103558] [2022-03-19 06:00:48,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:48,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 06:00:48,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:48,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 06:00:48,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:48,668 INFO L87 Difference]: Start difference. First operand 344 states and 381 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-19 06:00:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:49,572 INFO L93 Difference]: Finished difference Result 358 states and 396 transitions. [2022-03-19 06:00:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-19 06:00:49,573 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) Word has length 347 [2022-03-19 06:00:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:49,575 INFO L225 Difference]: With dead ends: 358 [2022-03-19 06:00:49,575 INFO L226 Difference]: Without dead ends: 353 [2022-03-19 06:00:49,576 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 640 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3239, Invalid=4771, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 06:00:49,576 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 110 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:49,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 376 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:00:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-19 06:00:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-03-19 06:00:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 271 states have (on average 1.1402214022140222) internal successors, (309), 271 states have internal predecessors, (309), 42 states have call successors, (42), 41 states have call predecessors, (42), 39 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 06:00:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 391 transitions. [2022-03-19 06:00:49,636 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 391 transitions. Word has length 347 [2022-03-19 06:00:49,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:49,636 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 391 transitions. [2022-03-19 06:00:49,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-19 06:00:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 391 transitions. [2022-03-19 06:00:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-03-19 06:00:49,638 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:49,638 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:49,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-19 06:00:49,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 06:00:49,853 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 73 times [2022-03-19 06:00:49,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:49,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [936342923] [2022-03-19 06:00:49,854 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 74 times [2022-03-19 06:00:49,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:49,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726208503] [2022-03-19 06:00:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:49,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:49,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:49,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979538778] [2022-03-19 06:00:49,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:00:49,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:49,866 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:49,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 06:00:49,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:00:49,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:50,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 06:00:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 6068 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:51,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 3404 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2022-03-19 06:00:52,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726208503] [2022-03-19 06:00:52,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:52,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979538778] [2022-03-19 06:00:52,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979538778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:52,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:52,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 54 [2022-03-19 06:00:52,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:52,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [936342923] [2022-03-19 06:00:52,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [936342923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:52,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:52,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 06:00:52,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978104789] [2022-03-19 06:00:52,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:52,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 06:00:52,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 06:00:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:52,307 INFO L87 Difference]: Start difference. First operand 353 states and 391 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-19 06:00:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:53,027 INFO L93 Difference]: Finished difference Result 367 states and 406 transitions. [2022-03-19 06:00:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-19 06:00:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) Word has length 356 [2022-03-19 06:00:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:53,029 INFO L225 Difference]: With dead ends: 367 [2022-03-19 06:00:53,029 INFO L226 Difference]: Without dead ends: 362 [2022-03-19 06:00:53,030 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 658 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3292, Invalid=4898, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 06:00:53,030 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 172 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:53,030 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 372 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:00:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-19 06:00:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-03-19 06:00:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 278 states have internal predecessors, (317), 43 states have call successors, (43), 42 states have call predecessors, (43), 40 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-19 06:00:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 401 transitions. [2022-03-19 06:00:53,049 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 401 transitions. Word has length 356 [2022-03-19 06:00:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:53,050 INFO L478 AbstractCegarLoop]: Abstraction has 362 states and 401 transitions. [2022-03-19 06:00:53,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-19 06:00:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 401 transitions. [2022-03-19 06:00:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-19 06:00:53,051 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:53,051 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:53,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:53,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-19 06:00:53,276 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:53,277 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 75 times [2022-03-19 06:00:53,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:53,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [209078663] [2022-03-19 06:00:53,277 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 76 times [2022-03-19 06:00:53,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:53,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068863832] [2022-03-19 06:00:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:53,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:53,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:53,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613135544] [2022-03-19 06:00:53,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:00:53,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:53,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:53,302 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:53,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 06:00:53,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:00:53,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:53,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-19 06:00:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 6403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:54,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 3591 refuted. 0 times theorem prover too weak. 2816 trivial. 0 not checked. [2022-03-19 06:00:55,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068863832] [2022-03-19 06:00:55,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613135544] [2022-03-19 06:00:55,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613135544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:55,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:55,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 54 [2022-03-19 06:00:55,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [209078663] [2022-03-19 06:00:55,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [209078663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:55,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:55,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 06:00:55,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151082270] [2022-03-19 06:00:55,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:55,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 06:00:55,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 06:00:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:55,091 INFO L87 Difference]: Start difference. First operand 362 states and 401 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-19 06:00:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:55,811 INFO L93 Difference]: Finished difference Result 376 states and 416 transitions. [2022-03-19 06:00:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-19 06:00:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) Word has length 365 [2022-03-19 06:00:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:55,813 INFO L225 Difference]: With dead ends: 376 [2022-03-19 06:00:55,813 INFO L226 Difference]: Without dead ends: 371 [2022-03-19 06:00:55,815 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 676 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3345, Invalid=5027, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 06:00:55,815 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 151 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:55,815 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 398 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:00:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-19 06:00:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-03-19 06:00:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.1403508771929824) internal successors, (325), 285 states have internal predecessors, (325), 44 states have call successors, (44), 43 states have call predecessors, (44), 41 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-19 06:00:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 411 transitions. [2022-03-19 06:00:55,856 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 411 transitions. Word has length 365 [2022-03-19 06:00:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:55,856 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 411 transitions. [2022-03-19 06:00:55,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-19 06:00:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 411 transitions. [2022-03-19 06:00:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-03-19 06:00:55,858 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:55,858 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:55,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-19 06:00:56,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:56,079 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:56,080 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 77 times [2022-03-19 06:00:56,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:56,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1586476764] [2022-03-19 06:00:56,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:56,081 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 78 times [2022-03-19 06:00:56,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:56,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408441758] [2022-03-19 06:00:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:56,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:56,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:56,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966162187] [2022-03-19 06:00:56,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:00:56,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:56,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:56,092 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:56,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 06:00:56,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-19 06:00:56,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:56,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 06:00:56,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 6747 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:57,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:00:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 3783 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-03-19 06:00:57,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:00:57,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408441758] [2022-03-19 06:00:57,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:00:57,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966162187] [2022-03-19 06:00:57,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966162187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:00:57,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:00:57,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 54 [2022-03-19 06:00:57,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:00:57,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1586476764] [2022-03-19 06:00:57,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1586476764] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:00:57,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:00:57,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 06:00:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008844797] [2022-03-19 06:00:57,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:00:57,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 06:00:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 06:00:57,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:00:57,797 INFO L87 Difference]: Start difference. First operand 371 states and 411 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-19 06:00:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:00:58,406 INFO L93 Difference]: Finished difference Result 385 states and 426 transitions. [2022-03-19 06:00:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 06:00:58,406 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) Word has length 374 [2022-03-19 06:00:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:00:58,408 INFO L225 Difference]: With dead ends: 385 [2022-03-19 06:00:58,408 INFO L226 Difference]: Without dead ends: 380 [2022-03-19 06:00:58,409 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 694 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3398, Invalid=5158, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 06:00:58,414 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 184 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:00:58,415 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 382 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:00:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-19 06:00:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-03-19 06:00:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 292 states have (on average 1.1404109589041096) internal successors, (333), 292 states have internal predecessors, (333), 45 states have call successors, (45), 44 states have call predecessors, (45), 42 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 06:00:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 421 transitions. [2022-03-19 06:00:58,438 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 421 transitions. Word has length 374 [2022-03-19 06:00:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:00:58,440 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 421 transitions. [2022-03-19 06:00:58,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-19 06:00:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 421 transitions. [2022-03-19 06:00:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-03-19 06:00:58,442 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:00:58,442 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:00:58,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 06:00:58,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:58,650 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:00:58,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:00:58,651 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 79 times [2022-03-19 06:00:58,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:00:58,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1783890403] [2022-03-19 06:00:58,652 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:00:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 80 times [2022-03-19 06:00:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:00:58,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430439912] [2022-03-19 06:00:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:00:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:00:58,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:00:58,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914139807] [2022-03-19 06:00:58,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:00:58,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:00:58,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:00:58,680 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:00:58,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 06:00:58,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:00:58,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:00:58,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-19 06:00:58,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:00:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 7100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:00:59,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 3980 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-03-19 06:01:00,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:00,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430439912] [2022-03-19 06:01:00,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:00,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914139807] [2022-03-19 06:01:00,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914139807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:00,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:00,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 54 [2022-03-19 06:01:00,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:00,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1783890403] [2022-03-19 06:01:00,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1783890403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:00,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:00,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 06:01:00,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146579408] [2022-03-19 06:01:00,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:00,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 06:01:00,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 06:01:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:01:00,181 INFO L87 Difference]: Start difference. First operand 380 states and 421 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-19 06:01:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:00,730 INFO L93 Difference]: Finished difference Result 394 states and 436 transitions. [2022-03-19 06:01:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 06:01:00,730 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) Word has length 383 [2022-03-19 06:01:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:00,732 INFO L225 Difference]: With dead ends: 394 [2022-03-19 06:01:00,732 INFO L226 Difference]: Without dead ends: 389 [2022-03-19 06:01:00,733 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 712 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3451, Invalid=5291, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 06:01:00,736 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 146 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:00,736 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 420 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:01:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-19 06:01:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2022-03-19 06:01:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 299 states have (on average 1.140468227424749) internal successors, (341), 299 states have internal predecessors, (341), 46 states have call successors, (46), 45 states have call predecessors, (46), 43 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 06:01:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 431 transitions. [2022-03-19 06:01:00,782 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 431 transitions. Word has length 383 [2022-03-19 06:01:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:00,782 INFO L478 AbstractCegarLoop]: Abstraction has 389 states and 431 transitions. [2022-03-19 06:01:00,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-19 06:01:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 431 transitions. [2022-03-19 06:01:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-03-19 06:01:00,784 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:00,784 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:00,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:00,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-19 06:01:00,984 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 81 times [2022-03-19 06:01:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:00,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966857631] [2022-03-19 06:01:00,985 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 82 times [2022-03-19 06:01:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:00,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411973077] [2022-03-19 06:01:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:00,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:00,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789933393] [2022-03-19 06:01:00,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:01:00,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:00,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:01,008 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:01,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 06:01:01,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:01:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:01,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 06:01:01,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 7462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:01:01,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 4182 refuted. 0 times theorem prover too weak. 3284 trivial. 0 not checked. [2022-03-19 06:01:02,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:02,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411973077] [2022-03-19 06:01:02,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:02,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789933393] [2022-03-19 06:01:02,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789933393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:02,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:02,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 54 [2022-03-19 06:01:02,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966857631] [2022-03-19 06:01:02,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966857631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:02,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:02,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 06:01:02,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600746623] [2022-03-19 06:01:02,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:02,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 06:01:02,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 06:01:02,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:01:02,335 INFO L87 Difference]: Start difference. First operand 389 states and 431 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-19 06:01:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:02,929 INFO L93 Difference]: Finished difference Result 403 states and 446 transitions. [2022-03-19 06:01:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-19 06:01:02,930 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) Word has length 392 [2022-03-19 06:01:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:02,931 INFO L225 Difference]: With dead ends: 403 [2022-03-19 06:01:02,931 INFO L226 Difference]: Without dead ends: 398 [2022-03-19 06:01:02,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 730 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3504, Invalid=5426, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 06:01:02,934 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 158 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:02,934 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 410 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:01:02,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-19 06:01:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-03-19 06:01:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 306 states have (on average 1.1405228758169934) internal successors, (349), 306 states have internal predecessors, (349), 47 states have call successors, (47), 46 states have call predecessors, (47), 44 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-19 06:01:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 441 transitions. [2022-03-19 06:01:02,972 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 441 transitions. Word has length 392 [2022-03-19 06:01:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:02,972 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 441 transitions. [2022-03-19 06:01:02,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-19 06:01:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 441 transitions. [2022-03-19 06:01:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-03-19 06:01:02,974 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:02,974 INFO L500 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:03,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:03,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 06:01:03,192 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 83 times [2022-03-19 06:01:03,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:03,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1415193617] [2022-03-19 06:01:03,193 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:03,193 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 84 times [2022-03-19 06:01:03,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:03,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059567546] [2022-03-19 06:01:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:03,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:03,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19542519] [2022-03-19 06:01:03,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:01:03,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:03,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:03,202 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:03,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 06:01:03,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-19 06:01:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-19 06:01:03,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 7833 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:01:04,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 4389 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-03-19 06:01:05,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:05,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059567546] [2022-03-19 06:01:05,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:05,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19542519] [2022-03-19 06:01:05,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19542519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:05,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:05,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 54 [2022-03-19 06:01:05,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1415193617] [2022-03-19 06:01:05,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1415193617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:05,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:05,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 06:01:05,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532873762] [2022-03-19 06:01:05,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:05,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 06:01:05,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 06:01:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:01:05,315 INFO L87 Difference]: Start difference. First operand 398 states and 441 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-19 06:01:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:06,250 INFO L93 Difference]: Finished difference Result 412 states and 456 transitions. [2022-03-19 06:01:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-19 06:01:06,251 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) Word has length 401 [2022-03-19 06:01:06,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:06,252 INFO L225 Difference]: With dead ends: 412 [2022-03-19 06:01:06,252 INFO L226 Difference]: Without dead ends: 407 [2022-03-19 06:01:06,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 748 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3557, Invalid=5563, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 06:01:06,253 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 212 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:06,253 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 406 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:01:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-19 06:01:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-03-19 06:01:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 313 states have (on average 1.1405750798722045) internal successors, (357), 313 states have internal predecessors, (357), 48 states have call successors, (48), 47 states have call predecessors, (48), 45 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-19 06:01:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 451 transitions. [2022-03-19 06:01:06,271 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 451 transitions. Word has length 401 [2022-03-19 06:01:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:06,271 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 451 transitions. [2022-03-19 06:01:06,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-19 06:01:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 451 transitions. [2022-03-19 06:01:06,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-03-19 06:01:06,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:06,273 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:06,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:06,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-19 06:01:06,474 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 85 times [2022-03-19 06:01:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:06,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698618612] [2022-03-19 06:01:06,475 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:06,475 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 86 times [2022-03-19 06:01:06,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:06,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531013386] [2022-03-19 06:01:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:06,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:06,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:06,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930213891] [2022-03-19 06:01:06,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:01:06,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:06,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:06,484 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:06,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 06:01:06,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:01:06,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 06:01:06,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 8213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:01:07,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 4601 refuted. 0 times theorem prover too weak. 3616 trivial. 0 not checked. [2022-03-19 06:01:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531013386] [2022-03-19 06:01:07,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930213891] [2022-03-19 06:01:07,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930213891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:07,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:07,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 54 [2022-03-19 06:01:07,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698618612] [2022-03-19 06:01:07,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698618612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:07,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:07,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 06:01:07,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671064523] [2022-03-19 06:01:07,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:07,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 06:01:07,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 06:01:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:01:07,880 INFO L87 Difference]: Start difference. First operand 407 states and 451 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-19 06:01:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:08,495 INFO L93 Difference]: Finished difference Result 421 states and 466 transitions. [2022-03-19 06:01:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-19 06:01:08,496 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) Word has length 410 [2022-03-19 06:01:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:08,497 INFO L225 Difference]: With dead ends: 421 [2022-03-19 06:01:08,497 INFO L226 Difference]: Without dead ends: 416 [2022-03-19 06:01:08,498 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 766 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3610, Invalid=5702, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 06:01:08,498 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 134 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:08,499 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 432 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:01:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-19 06:01:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-03-19 06:01:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 320 states have (on average 1.140625) internal successors, (365), 320 states have internal predecessors, (365), 49 states have call successors, (49), 48 states have call predecessors, (49), 46 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-19 06:01:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 461 transitions. [2022-03-19 06:01:08,534 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 461 transitions. Word has length 410 [2022-03-19 06:01:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:08,534 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 461 transitions. [2022-03-19 06:01:08,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-19 06:01:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 461 transitions. [2022-03-19 06:01:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-03-19 06:01:08,536 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:08,536 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:08,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:08,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:08,754 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:08,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:08,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 87 times [2022-03-19 06:01:08,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:08,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2088235800] [2022-03-19 06:01:08,755 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 88 times [2022-03-19 06:01:08,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:08,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228056143] [2022-03-19 06:01:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:08,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:08,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:08,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173437119] [2022-03-19 06:01:08,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:01:08,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:08,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:08,765 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:08,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 06:01:08,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:01:08,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-19 06:01:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 8602 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:01:09,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 4818 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2022-03-19 06:01:10,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:10,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228056143] [2022-03-19 06:01:10,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:10,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173437119] [2022-03-19 06:01:10,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173437119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:10,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:10,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 54 [2022-03-19 06:01:10,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:10,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2088235800] [2022-03-19 06:01:10,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2088235800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:10,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:10,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 06:01:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154859590] [2022-03-19 06:01:10,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:10,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 06:01:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 06:01:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:01:10,345 INFO L87 Difference]: Start difference. First operand 416 states and 461 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-19 06:01:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:11,574 INFO L93 Difference]: Finished difference Result 430 states and 476 transitions. [2022-03-19 06:01:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-19 06:01:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) Word has length 419 [2022-03-19 06:01:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:11,577 INFO L225 Difference]: With dead ends: 430 [2022-03-19 06:01:11,577 INFO L226 Difference]: Without dead ends: 425 [2022-03-19 06:01:11,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3663, Invalid=5843, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 06:01:11,580 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 162 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:11,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 428 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:01:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-19 06:01:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-03-19 06:01:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 327 states have (on average 1.1406727828746177) internal successors, (373), 327 states have internal predecessors, (373), 50 states have call successors, (50), 49 states have call predecessors, (50), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-19 06:01:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 471 transitions. [2022-03-19 06:01:11,627 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 471 transitions. Word has length 419 [2022-03-19 06:01:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:11,627 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 471 transitions. [2022-03-19 06:01:11,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-19 06:01:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 471 transitions. [2022-03-19 06:01:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-03-19 06:01:11,630 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:11,630 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:11,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:11,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 06:01:11,851 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 89 times [2022-03-19 06:01:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [821669615] [2022-03-19 06:01:11,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 90 times [2022-03-19 06:01:11,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:11,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444179400] [2022-03-19 06:01:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:11,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:11,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814623670] [2022-03-19 06:01:11,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:01:11,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:11,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:11,865 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:11,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 06:01:12,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-19 06:01:12,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:12,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-19 06:01:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 9000 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:01:13,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 5040 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-03-19 06:01:14,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:14,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444179400] [2022-03-19 06:01:14,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:14,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814623670] [2022-03-19 06:01:14,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814623670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:14,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:14,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 54 [2022-03-19 06:01:14,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:14,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [821669615] [2022-03-19 06:01:14,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [821669615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:14,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:14,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 06:01:14,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984562879] [2022-03-19 06:01:14,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:14,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 06:01:14,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 06:01:14,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:01:14,819 INFO L87 Difference]: Start difference. First operand 425 states and 471 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-19 06:01:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:16,081 INFO L93 Difference]: Finished difference Result 439 states and 486 transitions. [2022-03-19 06:01:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-19 06:01:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 428 [2022-03-19 06:01:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:16,083 INFO L225 Difference]: With dead ends: 439 [2022-03-19 06:01:16,083 INFO L226 Difference]: Without dead ends: 434 [2022-03-19 06:01:16,085 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 802 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3716, Invalid=5986, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 06:01:16,085 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 247 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:16,085 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 430 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:01:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-19 06:01:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-03-19 06:01:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 06:01:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-03-19 06:01:16,114 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 428 [2022-03-19 06:01:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:16,115 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-03-19 06:01:16,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-19 06:01:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-03-19 06:01:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-03-19 06:01:16,117 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:16,117 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:16,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:16,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 06:01:16,326 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:16,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 91 times [2022-03-19 06:01:16,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:16,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [310149692] [2022-03-19 06:01:16,327 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 92 times [2022-03-19 06:01:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:16,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004822049] [2022-03-19 06:01:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:16,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:16,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:16,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665859410] [2022-03-19 06:01:16,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:01:16,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:16,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:16,339 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:16,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 06:01:16,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:01:16,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:16,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-19 06:01:16,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:01:18,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-03-19 06:01:19,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:19,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004822049] [2022-03-19 06:01:19,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:19,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665859410] [2022-03-19 06:01:19,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665859410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:19,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:19,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 54 [2022-03-19 06:01:19,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:19,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [310149692] [2022-03-19 06:01:19,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [310149692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:19,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:19,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-19 06:01:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420533158] [2022-03-19 06:01:19,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:19,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 06:01:19,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 06:01:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:01:19,005 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-19 06:01:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:20,343 INFO L93 Difference]: Finished difference Result 448 states and 496 transitions. [2022-03-19 06:01:20,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-19 06:01:20,344 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) Word has length 437 [2022-03-19 06:01:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:20,346 INFO L225 Difference]: With dead ends: 448 [2022-03-19 06:01:20,346 INFO L226 Difference]: Without dead ends: 443 [2022-03-19 06:01:20,347 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 820 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3769, Invalid=6131, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 06:01:20,347 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 191 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:20,347 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 444 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 06:01:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-19 06:01:20,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-03-19 06:01:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 341 states have (on average 1.1407624633431086) internal successors, (389), 341 states have internal predecessors, (389), 52 states have call successors, (52), 51 states have call predecessors, (52), 49 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-19 06:01:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 491 transitions. [2022-03-19 06:01:20,385 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 491 transitions. Word has length 437 [2022-03-19 06:01:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:20,386 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 491 transitions. [2022-03-19 06:01:20,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-19 06:01:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 491 transitions. [2022-03-19 06:01:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-03-19 06:01:20,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:20,389 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:20,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:20,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 06:01:20,610 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 93 times [2022-03-19 06:01:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:20,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1759670033] [2022-03-19 06:01:20,611 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:20,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 94 times [2022-03-19 06:01:20,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:20,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115518144] [2022-03-19 06:01:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:20,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:20,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588551810] [2022-03-19 06:01:20,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:01:20,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:20,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:20,639 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:20,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 06:01:20,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:01:20,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-19 06:01:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 9823 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:01:22,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 5499 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-03-19 06:01:23,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115518144] [2022-03-19 06:01:23,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588551810] [2022-03-19 06:01:23,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588551810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:23,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:23,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 54 [2022-03-19 06:01:23,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:23,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1759670033] [2022-03-19 06:01:23,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1759670033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:23,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:23,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-19 06:01:23,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152125293] [2022-03-19 06:01:23,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:23,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 06:01:23,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:23,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 06:01:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:01:23,049 INFO L87 Difference]: Start difference. First operand 443 states and 491 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-19 06:01:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:23,902 INFO L93 Difference]: Finished difference Result 457 states and 506 transitions. [2022-03-19 06:01:23,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-19 06:01:23,903 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) Word has length 446 [2022-03-19 06:01:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:23,905 INFO L225 Difference]: With dead ends: 457 [2022-03-19 06:01:23,905 INFO L226 Difference]: Without dead ends: 452 [2022-03-19 06:01:23,906 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3822, Invalid=6278, Unknown=0, NotChecked=0, Total=10100 [2022-03-19 06:01:23,906 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 200 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:23,906 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 458 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:01:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-19 06:01:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-03-19 06:01:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 348 states have (on average 1.1408045977011494) internal successors, (397), 348 states have internal predecessors, (397), 53 states have call successors, (53), 52 states have call predecessors, (53), 50 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-19 06:01:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 501 transitions. [2022-03-19 06:01:23,926 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 501 transitions. Word has length 446 [2022-03-19 06:01:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:23,927 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 501 transitions. [2022-03-19 06:01:23,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-19 06:01:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 501 transitions. [2022-03-19 06:01:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-03-19 06:01:23,928 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:23,929 INFO L500 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:23,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:24,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-19 06:01:24,147 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 95 times [2022-03-19 06:01:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:24,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082388056] [2022-03-19 06:01:24,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 96 times [2022-03-19 06:01:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:24,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958918604] [2022-03-19 06:01:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:24,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:24,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143209528] [2022-03-19 06:01:24,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:01:24,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:24,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:24,164 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:24,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 06:01:24,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-03-19 06:01:24,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-19 06:01:24,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10348 backedges. 96 proven. 10248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:01:25,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10348 backedges. 96 proven. 5736 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2022-03-19 06:01:26,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:26,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958918604] [2022-03-19 06:01:26,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:26,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143209528] [2022-03-19 06:01:26,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143209528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:26,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:26,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 54 [2022-03-19 06:01:26,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:26,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082388056] [2022-03-19 06:01:26,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082388056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:26,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:26,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-19 06:01:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480456163] [2022-03-19 06:01:26,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:26,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-19 06:01:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-19 06:01:26,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 06:01:26,562 INFO L87 Difference]: Start difference. First operand 452 states and 501 transitions. Second operand has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (53), 51 states have call predecessors, (53), 49 states have return successors, (51), 49 states have call predecessors, (51), 50 states have call successors, (51) [2022-03-19 06:01:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:27,707 INFO L93 Difference]: Finished difference Result 466 states and 516 transitions. [2022-03-19 06:01:27,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-19 06:01:27,708 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (53), 51 states have call predecessors, (53), 49 states have return successors, (51), 49 states have call predecessors, (51), 50 states have call successors, (51) Word has length 455 [2022-03-19 06:01:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:27,709 INFO L225 Difference]: With dead ends: 466 [2022-03-19 06:01:27,710 INFO L226 Difference]: Without dead ends: 461 [2022-03-19 06:01:27,710 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 856 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3875, Invalid=6427, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 06:01:27,710 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 182 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:27,711 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 466 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:01:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-19 06:01:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2022-03-19 06:01:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 355 states have (on average 1.1408450704225352) internal successors, (405), 355 states have internal predecessors, (405), 54 states have call successors, (54), 53 states have call predecessors, (54), 51 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 06:01:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 511 transitions. [2022-03-19 06:01:27,740 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 511 transitions. Word has length 455 [2022-03-19 06:01:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:27,740 INFO L478 AbstractCegarLoop]: Abstraction has 461 states and 511 transitions. [2022-03-19 06:01:27,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (53), 51 states have call predecessors, (53), 49 states have return successors, (51), 49 states have call predecessors, (51), 50 states have call successors, (51) [2022-03-19 06:01:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 511 transitions. [2022-03-19 06:01:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2022-03-19 06:01:27,742 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:27,742 INFO L500 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 49, 49, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:27,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:27,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:27,962 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1413526756, now seen corresponding path program 97 times [2022-03-19 06:01:27,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:27,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531037785] [2022-03-19 06:01:27,963 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1413526756, now seen corresponding path program 98 times [2022-03-19 06:01:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:27,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837964123] [2022-03-19 06:01:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:27,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:27,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:27,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864340936] [2022-03-19 06:01:27,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:01:27,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:27,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:27,973 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:27,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 06:01:28,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:01:28,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:28,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-19 06:01:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10784 backedges. 98 proven. 10682 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:01:29,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10784 backedges. 98 proven. 5978 refuted. 0 times theorem prover too weak. 4708 trivial. 0 not checked. [2022-03-19 06:01:30,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837964123] [2022-03-19 06:01:30,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864340936] [2022-03-19 06:01:30,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864340936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:30,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:30,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2022-03-19 06:01:30,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:30,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531037785] [2022-03-19 06:01:30,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531037785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:30,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:30,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 06:01:30,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171493904] [2022-03-19 06:01:30,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:30,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 06:01:30,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 06:01:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 06:01:30,256 INFO L87 Difference]: Start difference. First operand 461 states and 511 transitions. Second operand has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (54), 52 states have call predecessors, (54), 50 states have return successors, (52), 50 states have call predecessors, (52), 51 states have call successors, (52) [2022-03-19 06:01:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:31,485 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2022-03-19 06:01:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-19 06:01:31,485 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (54), 52 states have call predecessors, (54), 50 states have return successors, (52), 50 states have call predecessors, (52), 51 states have call successors, (52) Word has length 464 [2022-03-19 06:01:31,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:31,487 INFO L225 Difference]: With dead ends: 475 [2022-03-19 06:01:31,487 INFO L226 Difference]: Without dead ends: 470 [2022-03-19 06:01:31,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 875 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 06:01:31,489 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 214 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:31,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 474 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:01:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-19 06:01:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-03-19 06:01:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 362 states have (on average 1.1408839779005524) internal successors, (413), 362 states have internal predecessors, (413), 55 states have call successors, (55), 54 states have call predecessors, (55), 52 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-19 06:01:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 521 transitions. [2022-03-19 06:01:31,512 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 521 transitions. Word has length 464 [2022-03-19 06:01:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:31,512 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 521 transitions. [2022-03-19 06:01:31,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (54), 52 states have call predecessors, (54), 50 states have return successors, (52), 50 states have call predecessors, (52), 51 states have call successors, (52) [2022-03-19 06:01:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 521 transitions. [2022-03-19 06:01:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-03-19 06:01:31,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:31,515 INFO L500 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:31,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:31,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-19 06:01:31,733 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash -368610346, now seen corresponding path program 99 times [2022-03-19 06:01:31,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:31,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [274851247] [2022-03-19 06:01:31,734 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash -368610346, now seen corresponding path program 100 times [2022-03-19 06:01:31,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:31,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802594692] [2022-03-19 06:01:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:31,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:31,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:31,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312301450] [2022-03-19 06:01:31,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:01:31,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:31,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:31,745 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:31,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 06:01:31,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:01:31,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-19 06:01:31,917 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 06:01:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 06:01:32,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 06:01:32,238 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 06:01:32,238 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 06:01:32,245 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 06:01:32,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:32,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:32,462 INFO L718 BasicCegarLoop]: Path program histogram: [100, 2, 2, 2, 2] [2022-03-19 06:01:32,465 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 06:01:32,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 06:01:32 BoogieIcfgContainer [2022-03-19 06:01:32,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 06:01:32,524 INFO L158 Benchmark]: Toolchain (without parser) took 109278.98ms. Allocated memory was 199.2MB in the beginning and 483.4MB in the end (delta: 284.2MB). Free memory was 149.4MB in the beginning and 204.4MB in the end (delta: -54.9MB). Peak memory consumption was 229.8MB. Max. memory is 8.0GB. [2022-03-19 06:01:32,524 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 199.2MB. Free memory is still 165.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 06:01:32,524 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.79ms. Allocated memory is still 199.2MB. Free memory was 149.3MB in the beginning and 174.2MB in the end (delta: -24.9MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. [2022-03-19 06:01:32,524 INFO L158 Benchmark]: Boogie Preprocessor took 20.64ms. Allocated memory is still 199.2MB. Free memory was 174.2MB in the beginning and 172.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 06:01:32,525 INFO L158 Benchmark]: RCFGBuilder took 259.53ms. Allocated memory is still 199.2MB. Free memory was 172.8MB in the beginning and 162.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 06:01:32,527 INFO L158 Benchmark]: TraceAbstraction took 108793.64ms. Allocated memory was 199.2MB in the beginning and 483.4MB in the end (delta: 284.2MB). Free memory was 162.2MB in the beginning and 204.4MB in the end (delta: -42.1MB). Peak memory consumption was 243.6MB. Max. memory is 8.0GB. [2022-03-19 06:01:32,532 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 199.2MB. Free memory is still 165.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.79ms. Allocated memory is still 199.2MB. Free memory was 149.3MB in the beginning and 174.2MB in the end (delta: -24.9MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.64ms. Allocated memory is still 199.2MB. Free memory was 174.2MB in the beginning and 172.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 259.53ms. Allocated memory is still 199.2MB. Free memory was 172.8MB in the beginning and 162.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 108793.64ms. Allocated memory was 199.2MB in the beginning and 483.4MB in the end (delta: 284.2MB). Free memory was 162.2MB in the beginning and 204.4MB in the end (delta: -42.1MB). Peak memory consumption was 243.6MB. 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: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x1 >= 0) [L30] CALL assume_abort_if_not(x2 != 0) [L13] COND FALSE !(!cond) [L30] RET assume_abort_if_not(x2 != 0) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND FALSE !(counter++<50) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 108.7s, OverallIterations: 54, TraceHistogramMax: 51, PathProgramHistogramMax: 100, EmptinessCheckTime: 0.1s, AutomataDifference: 24.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4884 SdHoareTripleChecker+Valid, 6.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4881 mSDsluCounter, 14019 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11418 mSDsCounter, 1194 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8132 IncrementalHoareTripleChecker+Invalid, 9326 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1194 mSolverCounterUnsat, 2601 mSDtfsCounter, 8132 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25595 GetRequests, 22331 SyntacticMatches, 26 SemanticMatches, 3238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22984 ImplicationChecksByTransitivity, 42.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=470occurred in iteration=53, InterpolantAutomatonStates: 2666, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 53 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 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! [2022-03-19 06:01:32,561 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...