/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 02:31:23,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 02:31:23,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 02:31:23,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 02:31:23,727 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 02:31:23,737 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 02:31:23,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 02:31:23,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 02:31:23,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 02:31:23,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 02:31:23,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 02:31:23,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 02:31:23,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 02:31:23,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 02:31:23,740 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 02:31:23,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 02:31:23,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 02:31:23,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 02:31:23,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 02:31:23,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 02:31:23,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:31:23,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 02:31:23,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 02:31:23,741 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 02:31:23,741 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 02:31:23,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 02:31:23,741 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 02:31:23,741 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 02:31:23,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 02:31:23,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 02:31:23,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 02:31:23,937 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 02:31:23,938 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 02:31:23,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2022-03-18 02:31:23,991 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee8114a4/0f78edfdfbac4945875d9f18f2e36133/FLAG7a298acdd [2022-03-18 02:31:24,293 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 02:31:24,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2022-03-18 02:31:24,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee8114a4/0f78edfdfbac4945875d9f18f2e36133/FLAG7a298acdd [2022-03-18 02:31:24,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee8114a4/0f78edfdfbac4945875d9f18f2e36133 [2022-03-18 02:31:24,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 02:31:24,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 02:31:24,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 02:31:24,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 02:31:24,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 02:31:24,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52de9bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24, skipping insertion in model container [2022-03-18 02:31:24,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 02:31:24,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 02:31:24,873 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/egcd-ll_valuebound100.c[489,502] [2022-03-18 02:31:24,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:31:24,891 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 02:31:24,898 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/egcd-ll_valuebound100.c[489,502] [2022-03-18 02:31:24,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:31:24,921 INFO L208 MainTranslator]: Completed translation [2022-03-18 02:31:24,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24 WrapperNode [2022-03-18 02:31:24,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 02:31:24,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 02:31:24,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 02:31:24,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 02:31:24,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 02:31:24,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 02:31:24,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 02:31:24,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 02:31:24,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24" (1/1) ... [2022-03-18 02:31:24,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:31:24,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:24,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 02:31:24,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 02:31:25,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 02:31:25,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 02:31:25,005 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 02:31:25,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 02:31:25,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 02:31:25,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 02:31:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 02:31:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 02:31:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 02:31:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 02:31:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 02:31:25,053 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 02:31:25,054 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 02:31:25,164 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 02:31:25,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 02:31:25,169 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 02:31:25,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:31:25 BoogieIcfgContainer [2022-03-18 02:31:25,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 02:31:25,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 02:31:25,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 02:31:25,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 02:31:25,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:31:24" (1/3) ... [2022-03-18 02:31:25,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73799997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:31:25, skipping insertion in model container [2022-03-18 02:31:25,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:24" (2/3) ... [2022-03-18 02:31:25,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73799997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:31:25, skipping insertion in model container [2022-03-18 02:31:25,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:31:25" (3/3) ... [2022-03-18 02:31:25,192 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound100.c [2022-03-18 02:31:25,209 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 02:31:25,209 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 02:31:25,258 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 02:31:25,269 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 02:31:25,269 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 02:31:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 02:31:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 02:31:25,302 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:25,303 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:25,303 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-03-18 02:31:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:25,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [476982893] [2022-03-18 02:31:25,326 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-03-18 02:31:25,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:25,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866813567] [2022-03-18 02:31:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:25,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:31:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:25,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:31:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:25,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 02:31:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:25,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 02:31:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:25,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 02:31:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 02:31:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:25,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866813567] [2022-03-18 02:31:25,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866813567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:25,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:25,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:31:25,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [476982893] [2022-03-18 02:31:25,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [476982893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:25,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:25,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:31:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15141026] [2022-03-18 02:31:25,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:25,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:31:25,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:31:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:31:25,543 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:31:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:25,634 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-03-18 02:31:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:31:25,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-18 02:31:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:25,642 INFO L225 Difference]: With dead ends: 67 [2022-03-18 02:31:25,642 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 02:31:25,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:31:25,646 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:25,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:31:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 02:31:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 02:31:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:31:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-18 02:31:25,672 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-03-18 02:31:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:25,672 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-18 02:31:25,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:31:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-18 02:31:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 02:31:25,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:25,674 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:25,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 02:31:25,674 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-03-18 02:31:25,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:25,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1035970159] [2022-03-18 02:31:25,675 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:25,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-03-18 02:31:25,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:25,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63019921] [2022-03-18 02:31:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:25,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:25,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:25,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916729530] [2022-03-18 02:31:25,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:25,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:25,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:25,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 02:31:25,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:31:25,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:31:25,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 02:31:25,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:31:25,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:25,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63019921] [2022-03-18 02:31:25,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:25,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916729530] [2022-03-18 02:31:25,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916729530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:25,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:25,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:25,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:25,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1035970159] [2022-03-18 02:31:25,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1035970159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:25,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:25,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:25,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395670124] [2022-03-18 02:31:25,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:25,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:25,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:25,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:25,938 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 02:31:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:25,987 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-03-18 02:31:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:25,988 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-18 02:31:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:25,989 INFO L225 Difference]: With dead ends: 48 [2022-03-18 02:31:25,989 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 02:31:25,989 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:25,990 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:25,991 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 02:31:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-18 02:31:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 02:31:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-03-18 02:31:26,012 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-03-18 02:31:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:26,012 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-03-18 02:31:26,013 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 02:31:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-03-18 02:31:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 02:31:26,014 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:26,014 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:26,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:26,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:26,228 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-03-18 02:31:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:26,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033479605] [2022-03-18 02:31:26,229 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:26,229 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-03-18 02:31:26,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:26,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12227732] [2022-03-18 02:31:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:26,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:26,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:26,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804394999] [2022-03-18 02:31:26,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:26,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:26,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:26,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:26,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 02:31:26,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:26,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:26,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:31:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 02:31:26,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:31:26,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12227732] [2022-03-18 02:31:26,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804394999] [2022-03-18 02:31:26,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804394999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:26,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:26,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:26,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:26,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033479605] [2022-03-18 02:31:26,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033479605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:26,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:26,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:26,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819255414] [2022-03-18 02:31:26,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:26,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:26,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:26,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:26,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:26,414 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:31:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:26,460 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-03-18 02:31:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:26,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-18 02:31:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:26,463 INFO L225 Difference]: With dead ends: 52 [2022-03-18 02:31:26,463 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 02:31:26,463 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:26,464 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:26,465 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 02:31:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-18 02:31:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 02:31:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-03-18 02:31:26,475 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-03-18 02:31:26,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:26,475 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-03-18 02:31:26,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:31:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-03-18 02:31:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 02:31:26,476 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:26,478 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:26,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 02:31:26,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 02:31:26,680 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:26,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-03-18 02:31:26,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:26,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1199804638] [2022-03-18 02:31:26,681 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-03-18 02:31:26,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:26,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430006473] [2022-03-18 02:31:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:26,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:26,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298231683] [2022-03-18 02:31:26,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:26,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:26,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:26,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:26,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 02:31:26,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:26,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:26,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:31:26,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:31:26,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:31:26,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430006473] [2022-03-18 02:31:26,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298231683] [2022-03-18 02:31:26,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298231683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:26,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:26,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:26,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1199804638] [2022-03-18 02:31:26,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1199804638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:26,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:26,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:26,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99546522] [2022-03-18 02:31:26,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:26,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:26,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:26,838 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:31:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:26,880 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-03-18 02:31:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-18 02:31:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:26,883 INFO L225 Difference]: With dead ends: 74 [2022-03-18 02:31:26,883 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 02:31:26,883 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:26,884 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:26,884 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 02:31:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-18 02:31:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 02:31:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-03-18 02:31:26,894 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-03-18 02:31:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:26,894 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-03-18 02:31:26,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:31:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-03-18 02:31:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 02:31:26,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:26,895 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:26,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:27,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:27,112 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-03-18 02:31:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:27,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1198568357] [2022-03-18 02:31:27,113 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-03-18 02:31:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:27,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410288645] [2022-03-18 02:31:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:27,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:27,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779446954] [2022-03-18 02:31:27,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:27,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:27,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:27,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:27,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 02:31:27,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:27,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:27,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:31:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 02:31:27,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:31:27,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:27,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410288645] [2022-03-18 02:31:27,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:27,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779446954] [2022-03-18 02:31:27,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779446954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:27,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:27,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:27,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:27,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1198568357] [2022-03-18 02:31:27,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1198568357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:27,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:27,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:27,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516811336] [2022-03-18 02:31:27,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:27,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:27,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:27,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:27,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:27,240 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-18 02:31:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:27,269 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-18 02:31:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:27,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-03-18 02:31:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:27,272 INFO L225 Difference]: With dead ends: 76 [2022-03-18 02:31:27,272 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 02:31:27,272 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:27,275 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:27,275 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 02:31:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-18 02:31:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 02:31:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-03-18 02:31:27,294 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-03-18 02:31:27,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:27,295 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-03-18 02:31:27,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-18 02:31:27,295 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-03-18 02:31:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 02:31:27,296 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:27,296 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:27,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:27,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:27,514 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-03-18 02:31:27,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:27,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46150512] [2022-03-18 02:31:27,515 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:27,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-03-18 02:31:27,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:27,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940995066] [2022-03-18 02:31:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:27,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:27,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:27,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709781824] [2022-03-18 02:31:27,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:27,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:27,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:27,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:27,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 02:31:27,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:27,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 02:31:27,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 02:31:27,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:31:27,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940995066] [2022-03-18 02:31:27,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709781824] [2022-03-18 02:31:27,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709781824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:27,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:27,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:27,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46150512] [2022-03-18 02:31:27,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46150512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:27,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:27,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:27,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432071165] [2022-03-18 02:31:27,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:27,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:27,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:27,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:27,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:27,709 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:31:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:27,745 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-03-18 02:31:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-18 02:31:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:27,749 INFO L225 Difference]: With dead ends: 84 [2022-03-18 02:31:27,749 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 02:31:27,749 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:27,751 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:27,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 02:31:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-18 02:31:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 02:31:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-03-18 02:31:27,769 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-03-18 02:31:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:27,769 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-03-18 02:31:27,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:31:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-03-18 02:31:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 02:31:27,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:27,775 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:27,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:27,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:27,991 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-03-18 02:31:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:27,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [751623081] [2022-03-18 02:31:27,992 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-03-18 02:31:27,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:27,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935539161] [2022-03-18 02:31:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:27,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:28,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:28,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724358283] [2022-03-18 02:31:28,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:28,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:28,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:28,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:28,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 02:31:28,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:28,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:28,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 02:31:28,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 02:31:28,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 02:31:28,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:28,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935539161] [2022-03-18 02:31:28,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:28,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724358283] [2022-03-18 02:31:28,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724358283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:28,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:28,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:31:28,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:28,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [751623081] [2022-03-18 02:31:28,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [751623081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:28,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:28,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:31:28,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746043393] [2022-03-18 02:31:28,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:28,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:31:28,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:31:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:31:28,303 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:31:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:28,393 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-03-18 02:31:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:31:28,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-03-18 02:31:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:28,395 INFO L225 Difference]: With dead ends: 88 [2022-03-18 02:31:28,395 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 02:31:28,395 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:31:28,396 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:28,396 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 158 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:31:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 02:31:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-18 02:31:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 02:31:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-03-18 02:31:28,405 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-03-18 02:31:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:28,405 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-03-18 02:31:28,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:31:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-03-18 02:31:28,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 02:31:28,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:28,406 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:28,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:28,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:28,624 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-03-18 02:31:28,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:28,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153447241] [2022-03-18 02:31:28,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:28,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-03-18 02:31:28,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:28,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526063045] [2022-03-18 02:31:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:28,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:28,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:28,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010110974] [2022-03-18 02:31:28,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:28,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:28,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:28,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 02:31:28,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:28,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:28,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:31:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 02:31:28,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 02:31:28,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:28,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526063045] [2022-03-18 02:31:28,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:28,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010110974] [2022-03-18 02:31:28,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010110974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:28,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:28,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-18 02:31:28,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:28,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153447241] [2022-03-18 02:31:28,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153447241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:28,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:28,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:31:28,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815761945] [2022-03-18 02:31:28,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:28,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:31:28,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:31:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:31:28,929 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:31:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:29,003 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-03-18 02:31:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:31:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-18 02:31:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:29,006 INFO L225 Difference]: With dead ends: 118 [2022-03-18 02:31:29,006 INFO L226 Difference]: Without dead ends: 116 [2022-03-18 02:31:29,007 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:31:29,007 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:29,007 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 216 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-18 02:31:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-18 02:31:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 02:31:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-03-18 02:31:29,025 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-03-18 02:31:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:29,025 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-03-18 02:31:29,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:31:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-03-18 02:31:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 02:31:29,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:29,027 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:29,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:29,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:29,244 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:29,244 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-03-18 02:31:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:29,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818770005] [2022-03-18 02:31:29,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-03-18 02:31:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:29,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616860600] [2022-03-18 02:31:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:29,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:29,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:29,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657352415] [2022-03-18 02:31:29,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:29,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:29,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:29,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:29,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 02:31:29,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:29,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:29,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 02:31:29,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:31:29,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:31:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616860600] [2022-03-18 02:31:29,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657352415] [2022-03-18 02:31:29,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657352415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:29,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:29,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-18 02:31:29,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [818770005] [2022-03-18 02:31:29,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [818770005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:29,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:29,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:31:29,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423237844] [2022-03-18 02:31:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:29,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:31:29,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:31:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:31:29,572 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 02:31:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:29,646 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-03-18 02:31:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:31:29,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-03-18 02:31:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:29,648 INFO L225 Difference]: With dead ends: 137 [2022-03-18 02:31:29,648 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 02:31:29,648 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:31:29,649 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:29,649 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:29,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 02:31:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-18 02:31:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-18 02:31:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-03-18 02:31:29,660 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-03-18 02:31:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:29,660 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-03-18 02:31:29,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 02:31:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-03-18 02:31:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 02:31:29,661 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:29,661 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:29,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:29,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 02:31:29,876 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-03-18 02:31:29,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:29,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1283123325] [2022-03-18 02:31:29,877 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-03-18 02:31:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:29,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524331797] [2022-03-18 02:31:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:29,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:29,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:29,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241774787] [2022-03-18 02:31:29,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:29,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:29,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:29,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:29,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 02:31:29,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:29,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:29,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:31:29,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 02:31:30,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-18 02:31:30,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:30,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524331797] [2022-03-18 02:31:30,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:30,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241774787] [2022-03-18 02:31:30,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241774787] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:31:30,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:31:30,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-18 02:31:30,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1283123325] [2022-03-18 02:31:30,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1283123325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:30,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:30,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204192427] [2022-03-18 02:31:30,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:30,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:30,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:31:30,235 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:31:30,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:30,266 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-03-18 02:31:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:30,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-03-18 02:31:30,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:30,267 INFO L225 Difference]: With dead ends: 137 [2022-03-18 02:31:30,267 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 02:31:30,268 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:31:30,268 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:30,268 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:30,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 02:31:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-18 02:31:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-18 02:31:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-03-18 02:31:30,279 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-03-18 02:31:30,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:30,279 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-03-18 02:31:30,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:31:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-03-18 02:31:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 02:31:30,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:30,280 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:30,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:30,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 02:31:30,496 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:30,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-03-18 02:31:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:30,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180142933] [2022-03-18 02:31:30,497 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-03-18 02:31:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869897385] [2022-03-18 02:31:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:30,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:30,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61256761] [2022-03-18 02:31:30,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:31:30,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:30,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:30,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:30,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 02:31:30,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:31:30,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:30,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 02:31:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 39 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-18 02:31:30,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 42 proven. 14 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-18 02:31:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:31,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869897385] [2022-03-18 02:31:31,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:31,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61256761] [2022-03-18 02:31:31,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61256761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:31,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-03-18 02:31:31,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180142933] [2022-03-18 02:31:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180142933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:31,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:31:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942379491] [2022-03-18 02:31:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:31,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:31:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:31:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:31:31,167 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:31:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:31,403 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2022-03-18 02:31:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:31:31,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-03-18 02:31:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:31,404 INFO L225 Difference]: With dead ends: 166 [2022-03-18 02:31:31,404 INFO L226 Difference]: Without dead ends: 164 [2022-03-18 02:31:31,405 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:31:31,405 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:31,405 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 244 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:31:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-18 02:31:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2022-03-18 02:31:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 91 states have internal predecessors, (101), 42 states have call successors, (42), 20 states have call predecessors, (42), 19 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-18 02:31:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2022-03-18 02:31:31,418 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 74 [2022-03-18 02:31:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:31,418 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2022-03-18 02:31:31,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:31:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2022-03-18 02:31:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 02:31:31,419 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:31,419 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:31,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:31,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 02:31:31,636 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-03-18 02:31:31,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:31,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1971152569] [2022-03-18 02:31:31,637 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:31,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-03-18 02:31:31,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:31,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679441616] [2022-03-18 02:31:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:31,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:31,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040620006] [2022-03-18 02:31:31,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:31,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:31,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:31,646 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:31,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 02:31:31,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:31,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 02:31:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-18 02:31:32,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:32,302 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:31:32,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:32,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679441616] [2022-03-18 02:31:32,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:32,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040620006] [2022-03-18 02:31:32,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040620006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:31:32,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:31:32,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 02:31:32,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:32,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1971152569] [2022-03-18 02:31:32,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1971152569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:32,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:32,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:31:32,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596353834] [2022-03-18 02:31:32,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:32,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:31:32,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:32,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:31:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:31:32,943 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:31:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:33,263 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-03-18 02:31:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:31:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-03-18 02:31:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:33,266 INFO L225 Difference]: With dead ends: 184 [2022-03-18 02:31:33,266 INFO L226 Difference]: Without dead ends: 182 [2022-03-18 02:31:33,266 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:31:33,266 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:33,267 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 293 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:31:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-18 02:31:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2022-03-18 02:31:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.14) internal successors, (114), 103 states have internal predecessors, (114), 45 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 02:31:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 202 transitions. [2022-03-18 02:31:33,281 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 202 transitions. Word has length 74 [2022-03-18 02:31:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:33,282 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 202 transitions. [2022-03-18 02:31:33,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:31:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 202 transitions. [2022-03-18 02:31:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 02:31:33,282 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:33,283 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:33,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:33,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 02:31:33,483 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-03-18 02:31:33,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:33,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2110096407] [2022-03-18 02:31:33,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-03-18 02:31:33,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:33,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262963217] [2022-03-18 02:31:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:33,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:33,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:33,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440843490] [2022-03-18 02:31:33,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:31:33,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:33,501 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:33,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 02:31:33,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:31:33,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 02:31:33,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-18 02:31:33,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-18 02:31:33,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:33,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262963217] [2022-03-18 02:31:33,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:33,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440843490] [2022-03-18 02:31:33,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440843490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:33,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:33,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-18 02:31:33,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:33,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2110096407] [2022-03-18 02:31:33,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2110096407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:33,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:33,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:31:33,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565255492] [2022-03-18 02:31:33,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:33,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:31:33,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:33,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:31:33,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:31:33,966 INFO L87 Difference]: Start difference. First operand 168 states and 202 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:31:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:34,144 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2022-03-18 02:31:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:31:34,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-03-18 02:31:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:34,146 INFO L225 Difference]: With dead ends: 182 [2022-03-18 02:31:34,146 INFO L226 Difference]: Without dead ends: 169 [2022-03-18 02:31:34,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:31:34,147 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:34,147 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 186 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:31:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-18 02:31:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2022-03-18 02:31:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 95 states have internal predecessors, (99), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-18 02:31:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2022-03-18 02:31:34,162 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 79 [2022-03-18 02:31:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:34,162 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2022-03-18 02:31:34,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:31:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2022-03-18 02:31:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 02:31:34,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:34,163 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:34,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:34,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 02:31:34,381 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:34,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:34,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-03-18 02:31:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:34,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [987688445] [2022-03-18 02:31:34,382 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:34,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-03-18 02:31:34,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:34,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609082313] [2022-03-18 02:31:34,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:34,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:34,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:34,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109279228] [2022-03-18 02:31:34,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:34,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:34,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:34,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:34,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 02:31:34,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:34,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:34,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 02:31:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-18 02:31:34,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-18 02:31:35,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:35,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609082313] [2022-03-18 02:31:35,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:35,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109279228] [2022-03-18 02:31:35,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109279228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:35,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:35,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-18 02:31:35,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:35,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [987688445] [2022-03-18 02:31:35,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [987688445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:35,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:35,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:31:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78068997] [2022-03-18 02:31:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:35,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:31:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:31:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:31:35,162 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:31:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:35,519 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2022-03-18 02:31:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:31:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-03-18 02:31:35,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:35,520 INFO L225 Difference]: With dead ends: 171 [2022-03-18 02:31:35,520 INFO L226 Difference]: Without dead ends: 169 [2022-03-18 02:31:35,521 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:31:35,521 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:35,521 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 241 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:31:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-18 02:31:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2022-03-18 02:31:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 97 states have (on average 1.092783505154639) internal successors, (106), 101 states have internal predecessors, (106), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-18 02:31:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 183 transitions. [2022-03-18 02:31:35,538 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 183 transitions. Word has length 79 [2022-03-18 02:31:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:35,538 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 183 transitions. [2022-03-18 02:31:35,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:31:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 183 transitions. [2022-03-18 02:31:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 02:31:35,539 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:35,539 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:35,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:35,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 02:31:35,755 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:35,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-03-18 02:31:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:35,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1899381927] [2022-03-18 02:31:35,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-03-18 02:31:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:35,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334453537] [2022-03-18 02:31:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:35,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:35,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:35,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724028488] [2022-03-18 02:31:35,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:35,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:35,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:35,769 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:35,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 02:31:35,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:35,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 02:31:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-18 02:31:40,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-18 02:31:41,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:41,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334453537] [2022-03-18 02:31:41,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:41,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724028488] [2022-03-18 02:31:41,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724028488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:41,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:41,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 20 [2022-03-18 02:31:41,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:41,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1899381927] [2022-03-18 02:31:41,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1899381927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:41,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:41,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:31:41,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288033040] [2022-03-18 02:31:41,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:41,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:31:41,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:41,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:31:41,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=316, Unknown=1, NotChecked=0, Total=380 [2022-03-18 02:31:41,476 INFO L87 Difference]: Start difference. First operand 159 states and 183 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 02:31:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:43,695 INFO L93 Difference]: Finished difference Result 189 states and 222 transitions. [2022-03-18 02:31:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:31:43,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 92 [2022-03-18 02:31:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:43,696 INFO L225 Difference]: With dead ends: 189 [2022-03-18 02:31:43,696 INFO L226 Difference]: Without dead ends: 187 [2022-03-18 02:31:43,697 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=81, Invalid=424, Unknown=1, NotChecked=0, Total=506 [2022-03-18 02:31:43,697 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:43,697 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 215 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 382 Invalid, 0 Unknown, 54 Unchecked, 1.2s Time] [2022-03-18 02:31:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-18 02:31:43,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2022-03-18 02:31:43,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 110 states have (on average 1.1) internal successors, (121), 115 states have internal predecessors, (121), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-18 02:31:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 216 transitions. [2022-03-18 02:31:43,718 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 216 transitions. Word has length 92 [2022-03-18 02:31:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:43,718 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 216 transitions. [2022-03-18 02:31:43,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 02:31:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 216 transitions. [2022-03-18 02:31:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 02:31:43,719 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:43,719 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:43,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:43,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:43,935 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-03-18 02:31:43,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:43,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [904648490] [2022-03-18 02:31:43,936 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-03-18 02:31:43,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:43,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880814442] [2022-03-18 02:31:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:43,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:43,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:43,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647112319] [2022-03-18 02:31:43,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:43,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:43,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:43,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:43,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 02:31:43,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:43,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 02:31:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 65 proven. 54 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 02:31:44,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-18 02:31:45,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:45,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880814442] [2022-03-18 02:31:45,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:45,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647112319] [2022-03-18 02:31:45,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647112319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:45,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:45,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-18 02:31:45,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:45,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [904648490] [2022-03-18 02:31:45,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [904648490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:45,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:45,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 02:31:45,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999538866] [2022-03-18 02:31:45,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:45,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 02:31:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 02:31:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:31:45,075 INFO L87 Difference]: Start difference. First operand 183 states and 216 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:31:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:45,440 INFO L93 Difference]: Finished difference Result 220 states and 258 transitions. [2022-03-18 02:31:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:31:45,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2022-03-18 02:31:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:45,442 INFO L225 Difference]: With dead ends: 220 [2022-03-18 02:31:45,442 INFO L226 Difference]: Without dead ends: 218 [2022-03-18 02:31:45,442 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:31:45,442 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:45,443 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 316 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:31:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-18 02:31:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2022-03-18 02:31:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 127 states have (on average 1.1023622047244095) internal successors, (140), 131 states have internal predecessors, (140), 52 states have call successors, (52), 29 states have call predecessors, (52), 28 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 02:31:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 243 transitions. [2022-03-18 02:31:45,467 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 243 transitions. Word has length 92 [2022-03-18 02:31:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:45,467 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 243 transitions. [2022-03-18 02:31:45,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:31:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 243 transitions. [2022-03-18 02:31:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 02:31:45,468 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:45,468 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:45,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:45,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 02:31:45,683 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-03-18 02:31:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2054399270] [2022-03-18 02:31:45,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-03-18 02:31:45,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:45,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983637618] [2022-03-18 02:31:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:45,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:45,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306142675] [2022-03-18 02:31:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:31:45,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:45,692 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:45,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 02:31:45,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:31:45,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:45,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 02:31:45,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:45,958 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:31:45,959 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:31:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 02:31:50,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:50,656 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:34:36,292 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~s~0_BEFORE_CALL_112 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_112) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1) (* v_main_~s~0_BEFORE_CALL_112 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-18 02:34:54,343 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~s~0_BEFORE_CALL_112 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_112) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1) (* v_main_~s~0_BEFORE_CALL_112 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))))) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0))))) is different from true [2022-03-18 02:35:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:35:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983637618] [2022-03-18 02:35:08,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:35:08,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306142675] [2022-03-18 02:35:08,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306142675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:35:08,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:35:08,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 02:35:08,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:35:08,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2054399270] [2022-03-18 02:35:08,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2054399270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:35:08,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:35:08,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:35:08,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952630175] [2022-03-18 02:35:08,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:35:08,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:35:08,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:35:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=203, Unknown=20, NotChecked=62, Total=342 [2022-03-18 02:35:08,114 INFO L87 Difference]: Start difference. First operand 208 states and 243 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 02:35:15,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:35:17,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:35:45,745 WARN L232 SmtUtils]: Spent 28.13s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:35:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:35:46,262 INFO L93 Difference]: Finished difference Result 236 states and 281 transitions. [2022-03-18 02:35:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:35:46,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-03-18 02:35:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:35:46,264 INFO L225 Difference]: With dead ends: 236 [2022-03-18 02:35:46,264 INFO L226 Difference]: Without dead ends: 234 [2022-03-18 02:35:46,265 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 87.9s TimeCoverageRelationStatistics Valid=78, Invalid=288, Unknown=22, NotChecked=74, Total=462 [2022-03-18 02:35:46,265 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:35:46,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 250 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-03-18 02:35:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-03-18 02:35:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2022-03-18 02:35:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 140 states have (on average 1.1071428571428572) internal successors, (155), 145 states have internal predecessors, (155), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-18 02:35:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 276 transitions. [2022-03-18 02:35:46,298 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 276 transitions. Word has length 92 [2022-03-18 02:35:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:46,298 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 276 transitions. [2022-03-18 02:35:46,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 02:35:46,298 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 276 transitions. [2022-03-18 02:35:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 02:35:46,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:46,299 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:46,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 02:35:46,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 02:35:46,508 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:46,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-03-18 02:35:46,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:46,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [626465574] [2022-03-18 02:35:46,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:46,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-03-18 02:35:46,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:46,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855649953] [2022-03-18 02:35:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:46,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:46,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:46,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90313204] [2022-03-18 02:35:46,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:35:46,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:46,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:46,521 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:46,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 02:35:46,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:35:46,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:35:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 02:35:46,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:35:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-18 02:35:46,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:35:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-18 02:35:47,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:35:47,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855649953] [2022-03-18 02:35:47,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:35:47,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90313204] [2022-03-18 02:35:47,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90313204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:35:47,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:35:47,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-03-18 02:35:47,269 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:35:47,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [626465574] [2022-03-18 02:35:47,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [626465574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:35:47,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:35:47,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:35:47,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809693071] [2022-03-18 02:35:47,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:35:47,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:35:47,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:47,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:35:47,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:35:47,270 INFO L87 Difference]: Start difference. First operand 232 states and 276 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 02:35:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:35:47,547 INFO L93 Difference]: Finished difference Result 266 states and 313 transitions. [2022-03-18 02:35:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:35:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-03-18 02:35:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:35:47,548 INFO L225 Difference]: With dead ends: 266 [2022-03-18 02:35:47,548 INFO L226 Difference]: Without dead ends: 264 [2022-03-18 02:35:47,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:35:47,549 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:35:47,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 278 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:35:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-18 02:35:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-03-18 02:35:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 161 states have (on average 1.1055900621118013) internal successors, (178), 166 states have internal predecessors, (178), 67 states have call successors, (67), 36 states have call predecessors, (67), 35 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2022-03-18 02:35:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 311 transitions. [2022-03-18 02:35:47,586 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 311 transitions. Word has length 97 [2022-03-18 02:35:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:47,586 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 311 transitions. [2022-03-18 02:35:47,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 02:35:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 311 transitions. [2022-03-18 02:35:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 02:35:47,587 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:47,587 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:47,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 02:35:47,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 02:35:47,804 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-03-18 02:35:47,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:47,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769529401] [2022-03-18 02:35:47,805 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-03-18 02:35:47,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:47,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987280620] [2022-03-18 02:35:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:47,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:47,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:47,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461223386] [2022-03-18 02:35:47,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:35:47,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:47,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:47,813 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:47,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 02:35:47,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:35:47,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:35:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 02:35:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:35:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 76 proven. 57 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-18 02:35:48,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:35:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-18 02:35:48,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:35:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987280620] [2022-03-18 02:35:48,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:35:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461223386] [2022-03-18 02:35:48,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461223386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:35:48,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:35:48,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2022-03-18 02:35:48,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:35:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769529401] [2022-03-18 02:35:48,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769529401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:35:48,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:35:48,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:35:48,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629322182] [2022-03-18 02:35:48,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:35:48,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:35:48,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:35:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:35:48,843 INFO L87 Difference]: Start difference. First operand 264 states and 311 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:35:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:35:49,352 INFO L93 Difference]: Finished difference Result 294 states and 345 transitions. [2022-03-18 02:35:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:35:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-18 02:35:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:35:49,354 INFO L225 Difference]: With dead ends: 294 [2022-03-18 02:35:49,354 INFO L226 Difference]: Without dead ends: 292 [2022-03-18 02:35:49,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:35:49,355 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:35:49,355 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 282 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:35:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-03-18 02:35:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-03-18 02:35:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 179 states have (on average 1.106145251396648) internal successors, (198), 184 states have internal predecessors, (198), 73 states have call successors, (73), 40 states have call predecessors, (73), 39 states have return successors, (72), 67 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-18 02:35:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 343 transitions. [2022-03-18 02:35:49,396 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 343 transitions. Word has length 97 [2022-03-18 02:35:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:49,396 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 343 transitions. [2022-03-18 02:35:49,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:35:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 343 transitions. [2022-03-18 02:35:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 02:35:49,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:49,397 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:49,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 02:35:49,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:49,611 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-03-18 02:35:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:49,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467529638] [2022-03-18 02:35:49,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-03-18 02:35:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:49,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887377318] [2022-03-18 02:35:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:49,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:49,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197650027] [2022-03-18 02:35:49,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:35:49,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:49,619 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:49,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 02:35:49,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:35:49,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:35:49,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 02:35:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:35:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 97 proven. 33 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-03-18 02:35:50,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:35:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 107 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-18 02:35:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:35:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887377318] [2022-03-18 02:35:50,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:35:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197650027] [2022-03-18 02:35:50,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197650027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:35:50,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:35:50,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-18 02:35:50,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:35:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467529638] [2022-03-18 02:35:50,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467529638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:35:50,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:35:50,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:35:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476092351] [2022-03-18 02:35:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:35:50,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:35:50,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:35:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:35:50,398 INFO L87 Difference]: Start difference. First operand 292 states and 343 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:35:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:35:50,589 INFO L93 Difference]: Finished difference Result 310 states and 364 transitions. [2022-03-18 02:35:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:35:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 97 [2022-03-18 02:35:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:35:50,591 INFO L225 Difference]: With dead ends: 310 [2022-03-18 02:35:50,591 INFO L226 Difference]: Without dead ends: 308 [2022-03-18 02:35:50,591 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:35:50,592 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:35:50,592 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 160 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:35:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-18 02:35:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-03-18 02:35:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 190 states have (on average 1.1105263157894736) internal successors, (211), 194 states have internal predecessors, (211), 76 states have call successors, (76), 42 states have call predecessors, (76), 41 states have return successors, (75), 71 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-18 02:35:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 362 transitions. [2022-03-18 02:35:50,641 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 362 transitions. Word has length 97 [2022-03-18 02:35:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:50,642 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 362 transitions. [2022-03-18 02:35:50,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:35:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 362 transitions. [2022-03-18 02:35:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 02:35:50,643 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:50,643 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:50,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 02:35:50,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:50,859 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-03-18 02:35:50,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:50,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1156204141] [2022-03-18 02:35:50,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-03-18 02:35:50,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:50,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111454730] [2022-03-18 02:35:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:50,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:50,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:50,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801149349] [2022-03-18 02:35:50,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:35:50,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:50,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:50,869 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:50,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 02:35:51,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:35:51,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:35:51,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 02:35:51,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:56,383 WARN L232 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-18 02:37:28,157 WARN L232 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 9 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-18 02:40:19,833 WARN L232 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 4 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-18 02:45:39,446 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 53 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-03-18 02:45:40,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:01,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:46:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111454730] [2022-03-18 02:46:01,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:46:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801149349] [2022-03-18 02:46:01,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801149349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:46:01,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:46:01,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 02:46:01,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:46:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1156204141] [2022-03-18 02:46:01,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1156204141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:46:01,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:46:01,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:46:01,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949604656] [2022-03-18 02:46:01,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:46:01,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:46:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:46:01,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=463, Unknown=4, NotChecked=0, Total=552 [2022-03-18 02:46:01,029 INFO L87 Difference]: Start difference. First operand 308 states and 362 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:46:03,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []