/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:58:30,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:58:30,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:58:30,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 20:58:30,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:58:30,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:58:30,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:58:30,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 20:58:30,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:58:30,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:58:30,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:58:30,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:58:30,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:58:30,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:58:30,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:58:30,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:58:30,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:58:30,735 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:58:30,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:58:30,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:58:30,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:58:30,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:58:30,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:58:30,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:58:30,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:58:30,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:58:30,736 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:58:30,736 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:58:30,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:58:30,736 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:58:30,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:58:30,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:58:30,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:58:30,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:58:30,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:58:30,954 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:58:30,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-03-20 20:58:31,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c83b4c684/f01788f6d303495ebba43b638fe39ae8/FLAG901c3cca5 [2022-03-20 20:58:31,378 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:58:31,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-03-20 20:58:31,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c83b4c684/f01788f6d303495ebba43b638fe39ae8/FLAG901c3cca5 [2022-03-20 20:58:31,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c83b4c684/f01788f6d303495ebba43b638fe39ae8 [2022-03-20 20:58:31,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:58:31,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:58:31,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:58:31,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:58:31,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:58:31,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d2ae944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31, skipping insertion in model container [2022-03-20 20:58:31,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:58:31,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:58:31,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c[490,503] [2022-03-20 20:58:31,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:58:31,570 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:58:31,578 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c[490,503] [2022-03-20 20:58:31,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:58:31,608 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:58:31,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31 WrapperNode [2022-03-20 20:58:31,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:58:31,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:58:31,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:58:31,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:58:31,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:58:31,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:58:31,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:58:31,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:58:31,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31" (1/1) ... [2022-03-20 20:58:31,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:58:31,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:31,666 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) [2022-03-20 20:58:31,668 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 [2022-03-20 20:58:31,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:58:31,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:58:31,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:58:31,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:58:31,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:58:31,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:58:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:58:31,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:58:31,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:58:31,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:58:31,786 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:58:31,787 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:58:31,889 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:58:31,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:58:31,896 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 20:58:31,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:58:31 BoogieIcfgContainer [2022-03-20 20:58:31,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:58:31,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:58:31,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:58:31,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:58:31,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:58:31" (1/3) ... [2022-03-20 20:58:31,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3887098f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:58:31, skipping insertion in model container [2022-03-20 20:58:31,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:31" (2/3) ... [2022-03-20 20:58:31,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3887098f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:58:31, skipping insertion in model container [2022-03-20 20:58:31,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:58:31" (3/3) ... [2022-03-20 20:58:31,905 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2022-03-20 20:58:31,908 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:58:31,908 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:58:31,960 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:58:31,965 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 [2022-03-20 20:58:31,969 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:58:31,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 20:58:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 20:58:31,990 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:31,990 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:31,992 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:31,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2022-03-20 20:58:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:32,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847997936] [2022-03-20 20:58:32,009 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 2 times [2022-03-20 20:58:32,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:32,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100373956] [2022-03-20 20:58:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:32,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:32,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:58:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:32,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:58:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:32,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 20:58:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:32,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:32,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100373956] [2022-03-20 20:58:32,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100373956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:32,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:32,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:58:32,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:32,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847997936] [2022-03-20 20:58:32,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847997936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:32,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:32,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:58:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424337238] [2022-03-20 20:58:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:32,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:58:32,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:32,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:58:32,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:58:32,223 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:32,316 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-03-20 20:58:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:58:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 20:58:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:32,323 INFO L225 Difference]: With dead ends: 74 [2022-03-20 20:58:32,323 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 20:58:32,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:58:32,326 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:32,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 20:58:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 20:58:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 20:58:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-20 20:58:32,356 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-20 20:58:32,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:32,356 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-20 20:58:32,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-20 20:58:32,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 20:58:32,358 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:32,358 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:32,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:58:32,358 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:32,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:32,359 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2022-03-20 20:58:32,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:32,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [221213581] [2022-03-20 20:58:32,359 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:32,360 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 2 times [2022-03-20 20:58:32,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:32,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345983332] [2022-03-20 20:58:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:32,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:32,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:32,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172121296] [2022-03-20 20:58:32,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:32,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:32,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:32,377 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) [2022-03-20 20:58:32,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 20:58:32,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:58:32,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:58:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:32,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:32,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:32,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345983332] [2022-03-20 20:58:32,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:32,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172121296] [2022-03-20 20:58:32,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172121296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:32,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:32,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 20:58:32,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:32,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [221213581] [2022-03-20 20:58:32,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [221213581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:32,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:32,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 20:58:32,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911551820] [2022-03-20 20:58:32,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:32,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 20:58:32,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 20:58:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 20:58:32,488 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:32,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:32,500 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-03-20 20:58:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 20:58:32,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 20:58:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:32,502 INFO L225 Difference]: With dead ends: 44 [2022-03-20 20:58:32,502 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 20:58:32,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 20:58:32,503 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:32,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 20:58:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 20:58:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 20:58:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-20 20:58:32,510 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-20 20:58:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:32,511 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-20 20:58:32,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-20 20:58:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 20:58:32,512 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:32,512 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:32,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:32,728 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 [2022-03-20 20:58:32,728 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2022-03-20 20:58:32,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:32,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2101069026] [2022-03-20 20:58:32,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 2 times [2022-03-20 20:58:32,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:32,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419406900] [2022-03-20 20:58:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:32,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:32,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:32,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5328604] [2022-03-20 20:58:32,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:32,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:32,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:32,764 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) [2022-03-20 20:58:32,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 20:58:32,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:58:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:32,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 20:58:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:32,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:32,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:32,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419406900] [2022-03-20 20:58:32,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:32,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5328604] [2022-03-20 20:58:32,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5328604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:32,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:32,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:32,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:32,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2101069026] [2022-03-20 20:58:32,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2101069026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:32,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:32,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316096521] [2022-03-20 20:58:32,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:32,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:58:32,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:58:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:32,934 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 20:58:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:32,991 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-03-20 20:58:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:58:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-20 20:58:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:32,992 INFO L225 Difference]: With dead ends: 57 [2022-03-20 20:58:32,992 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 20:58:32,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:58:32,993 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:32,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 192 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 20:58:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-20 20:58:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:58:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-03-20 20:58:33,002 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 24 [2022-03-20 20:58:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:33,002 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-03-20 20:58:33,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 20:58:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-03-20 20:58:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 20:58:33,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:33,003 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:33,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:33,219 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 [2022-03-20 20:58:33,220 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2022-03-20 20:58:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:33,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346215653] [2022-03-20 20:58:33,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 2 times [2022-03-20 20:58:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:33,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389968965] [2022-03-20 20:58:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:33,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:33,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:33,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270732460] [2022-03-20 20:58:33,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:33,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:33,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:33,233 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) [2022-03-20 20:58:33,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 20:58:33,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:58:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:33,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:33,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389968965] [2022-03-20 20:58:33,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270732460] [2022-03-20 20:58:33,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270732460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:33,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:33,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:33,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346215653] [2022-03-20 20:58:33,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346215653] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:33,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:33,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:33,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998650449] [2022-03-20 20:58:33,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:33,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:33,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:33,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:33,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:33,330 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:33,349 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2022-03-20 20:58:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:58:33,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-20 20:58:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:33,351 INFO L225 Difference]: With dead ends: 77 [2022-03-20 20:58:33,351 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 20:58:33,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:33,352 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:33,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 20:58:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 20:58:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:58:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-20 20:58:33,360 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-20 20:58:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:33,360 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-20 20:58:33,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-20 20:58:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 20:58:33,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:33,361 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:33,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:33,577 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 [2022-03-20 20:58:33,577 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:33,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:33,578 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2022-03-20 20:58:33,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:33,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306960490] [2022-03-20 20:58:33,578 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:33,579 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 2 times [2022-03-20 20:58:33,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:33,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196322669] [2022-03-20 20:58:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:33,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:33,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:33,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170362878] [2022-03-20 20:58:33,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:33,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:33,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:33,591 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) [2022-03-20 20:58:33,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 20:58:33,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:33,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:58:33,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:33,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:33,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:33,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196322669] [2022-03-20 20:58:33,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170362878] [2022-03-20 20:58:33,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170362878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:33,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:33,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 20:58:33,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:33,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306960490] [2022-03-20 20:58:33,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306960490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:33,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:33,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:33,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414592633] [2022-03-20 20:58:33,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:33,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:58:33,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:58:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:58:33,802 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:33,834 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-03-20 20:58:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 20:58:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-03-20 20:58:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:33,837 INFO L225 Difference]: With dead ends: 67 [2022-03-20 20:58:33,837 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 20:58:33,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:58:33,840 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:33,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 20:58:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 20:58:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:58:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2022-03-20 20:58:33,862 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2022-03-20 20:58:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:33,862 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2022-03-20 20:58:33,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2022-03-20 20:58:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 20:58:33,863 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:33,863 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:33,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 20:58:34,082 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 [2022-03-20 20:58:34,082 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:34,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2022-03-20 20:58:34,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:34,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2069081395] [2022-03-20 20:58:34,083 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 2 times [2022-03-20 20:58:34,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:34,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787904109] [2022-03-20 20:58:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:34,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:34,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294502038] [2022-03-20 20:58:34,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:34,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:34,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:34,096 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) [2022-03-20 20:58:34,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 20:58:34,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:34,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:34,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:58:34,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 20:58:34,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 20:58:34,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:34,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787904109] [2022-03-20 20:58:34,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:34,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294502038] [2022-03-20 20:58:34,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294502038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:34,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:34,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:58:34,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:34,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2069081395] [2022-03-20 20:58:34,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2069081395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:34,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:34,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:34,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958368206] [2022-03-20 20:58:34,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:34,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:58:34,267 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:34,384 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-03-20 20:58:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:58:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-20 20:58:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:34,385 INFO L225 Difference]: With dead ends: 138 [2022-03-20 20:58:34,385 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 20:58:34,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:34,386 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 115 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:34,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 353 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 20:58:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2022-03-20 20:58:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 20:58:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2022-03-20 20:58:34,397 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2022-03-20 20:58:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:34,397 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2022-03-20 20:58:34,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2022-03-20 20:58:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 20:58:34,398 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:34,398 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:34,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 20:58:34,614 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 [2022-03-20 20:58:34,615 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:34,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2022-03-20 20:58:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:34,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [959610624] [2022-03-20 20:58:34,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 2 times [2022-03-20 20:58:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:34,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251290433] [2022-03-20 20:58:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:34,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:34,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:34,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734203145] [2022-03-20 20:58:34,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:34,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:34,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:34,635 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) [2022-03-20 20:58:34,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 20:58:34,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:34,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:34,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:58:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:34,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:34,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251290433] [2022-03-20 20:58:34,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734203145] [2022-03-20 20:58:34,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734203145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:34,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:34,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:34,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [959610624] [2022-03-20 20:58:34,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [959610624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:34,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:34,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:34,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393381908] [2022-03-20 20:58:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:34,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:58:34,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:58:34,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:34,741 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:34,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:34,770 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2022-03-20 20:58:34,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:58:34,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-20 20:58:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:34,771 INFO L225 Difference]: With dead ends: 127 [2022-03-20 20:58:34,771 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 20:58:34,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:34,771 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:34,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 165 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 20:58:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-20 20:58:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 20:58:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2022-03-20 20:58:34,781 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 35 [2022-03-20 20:58:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:34,781 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2022-03-20 20:58:34,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2022-03-20 20:58:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 20:58:34,782 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:34,782 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:34,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:35,000 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 [2022-03-20 20:58:35,001 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2022-03-20 20:58:35,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:35,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [301395579] [2022-03-20 20:58:35,001 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 2 times [2022-03-20 20:58:35,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:35,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826874269] [2022-03-20 20:58:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:35,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:35,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191034412] [2022-03-20 20:58:35,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:35,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:35,012 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) [2022-03-20 20:58:35,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 20:58:35,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:35,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:35,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 20:58:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:35,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:35,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:35,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826874269] [2022-03-20 20:58:35,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:35,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191034412] [2022-03-20 20:58:35,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191034412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:35,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:35,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 20:58:35,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:35,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [301395579] [2022-03-20 20:58:35,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [301395579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:35,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:35,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:58:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633751996] [2022-03-20 20:58:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:35,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:58:35,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:58:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:58:35,206 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:35,250 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2022-03-20 20:58:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:58:35,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-20 20:58:35,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:35,251 INFO L225 Difference]: With dead ends: 163 [2022-03-20 20:58:35,251 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 20:58:35,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:58:35,252 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:35,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 163 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 20:58:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-20 20:58:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 20:58:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2022-03-20 20:58:35,265 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 36 [2022-03-20 20:58:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:35,265 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2022-03-20 20:58:35,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2022-03-20 20:58:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 20:58:35,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:35,266 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:35,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:35,468 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 [2022-03-20 20:58:35,468 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:35,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2022-03-20 20:58:35,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:35,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183455505] [2022-03-20 20:58:35,469 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:35,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 2 times [2022-03-20 20:58:35,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:35,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518545836] [2022-03-20 20:58:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:35,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:35,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:35,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999299979] [2022-03-20 20:58:35,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:35,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:35,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:35,487 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) [2022-03-20 20:58:35,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 20:58:35,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:35,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:35,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 20:58:35,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 20:58:35,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:35,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:35,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518545836] [2022-03-20 20:58:35,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:35,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999299979] [2022-03-20 20:58:35,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999299979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:35,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:35,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 20:58:35,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:35,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183455505] [2022-03-20 20:58:35,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183455505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:35,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:35,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:58:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28951549] [2022-03-20 20:58:35,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:35,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:58:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:58:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:58:35,827 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:35,926 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-03-20 20:58:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:58:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-20 20:58:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:35,929 INFO L225 Difference]: With dead ends: 154 [2022-03-20 20:58:35,929 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 20:58:35,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:58:35,931 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 61 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:35,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 375 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 20:58:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-03-20 20:58:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 20:58:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2022-03-20 20:58:35,948 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2022-03-20 20:58:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:35,948 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2022-03-20 20:58:35,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2022-03-20 20:58:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 20:58:35,949 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:35,950 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:35,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 20:58:36,163 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 [2022-03-20 20:58:36,164 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 3 times [2022-03-20 20:58:36,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:36,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [937048064] [2022-03-20 20:58:36,164 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 4 times [2022-03-20 20:58:36,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:36,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367397247] [2022-03-20 20:58:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:36,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:36,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008705311] [2022-03-20 20:58:36,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:36,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:36,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:36,188 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) [2022-03-20 20:58:36,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 20:58:36,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:36,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:36,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:58:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:36,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:36,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367397247] [2022-03-20 20:58:36,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008705311] [2022-03-20 20:58:36,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008705311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:36,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:36,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:36,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [937048064] [2022-03-20 20:58:36,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [937048064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:36,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:36,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:36,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502607482] [2022-03-20 20:58:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:36,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:36,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:36,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:36,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:36,288 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 20:58:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:36,346 INFO L93 Difference]: Finished difference Result 300 states and 442 transitions. [2022-03-20 20:58:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:58:36,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-03-20 20:58:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:36,348 INFO L225 Difference]: With dead ends: 300 [2022-03-20 20:58:36,348 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 20:58:36,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:58:36,349 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:36,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 20:58:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 175. [2022-03-20 20:58:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 137 states have internal predecessors, (183), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 20:58:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 239 transitions. [2022-03-20 20:58:36,372 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 239 transitions. Word has length 37 [2022-03-20 20:58:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:36,372 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 239 transitions. [2022-03-20 20:58:36,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 20:58:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 239 transitions. [2022-03-20 20:58:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 20:58:36,373 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:36,373 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:36,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:36,589 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 [2022-03-20 20:58:36,590 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2022-03-20 20:58:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:36,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190363769] [2022-03-20 20:58:36,590 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 2 times [2022-03-20 20:58:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062510309] [2022-03-20 20:58:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:36,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:36,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:36,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428575889] [2022-03-20 20:58:36,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:36,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:36,612 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) [2022-03-20 20:58:36,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 20:58:36,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:36,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:36,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:58:36,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 20:58:36,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:36,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:36,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062510309] [2022-03-20 20:58:36,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428575889] [2022-03-20 20:58:36,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428575889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:36,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:36,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:58:36,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190363769] [2022-03-20 20:58:36,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190363769] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:36,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:36,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:58:36,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818559418] [2022-03-20 20:58:36,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:36,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:58:36,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:58:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:58:36,757 INFO L87 Difference]: Start difference. First operand 175 states and 239 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:36,852 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2022-03-20 20:58:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:58:36,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 20:58:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:36,854 INFO L225 Difference]: With dead ends: 193 [2022-03-20 20:58:36,854 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 20:58:36,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:58:36,854 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:36,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 270 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 20:58:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-20 20:58:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 146 states have internal predecessors, (194), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 20:58:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 258 transitions. [2022-03-20 20:58:36,869 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 258 transitions. Word has length 39 [2022-03-20 20:58:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:36,869 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 258 transitions. [2022-03-20 20:58:36,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 258 transitions. [2022-03-20 20:58:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 20:58:36,870 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:36,870 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:36,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:37,085 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 [2022-03-20 20:58:37,085 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2022-03-20 20:58:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:37,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1114350216] [2022-03-20 20:58:37,086 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 2 times [2022-03-20 20:58:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:37,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081051201] [2022-03-20 20:58:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:37,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:37,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:37,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256334428] [2022-03-20 20:58:37,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:37,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:37,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:37,094 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) [2022-03-20 20:58:37,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 20:58:37,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:37,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:37,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 20:58:37,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:37,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:37,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081051201] [2022-03-20 20:58:37,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256334428] [2022-03-20 20:58:37,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256334428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:37,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:37,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-20 20:58:37,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1114350216] [2022-03-20 20:58:37,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1114350216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:37,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:37,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:58:37,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637431950] [2022-03-20 20:58:37,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:37,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:58:37,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:58:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:58:37,557 INFO L87 Difference]: Start difference. First operand 190 states and 258 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 20:58:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:37,721 INFO L93 Difference]: Finished difference Result 199 states and 266 transitions. [2022-03-20 20:58:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:58:37,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-03-20 20:58:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:37,723 INFO L225 Difference]: With dead ends: 199 [2022-03-20 20:58:37,723 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 20:58:37,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:58:37,723 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 72 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:37,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 385 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 20:58:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-03-20 20:58:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 149 states have internal predecessors, (197), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 20:58:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2022-03-20 20:58:37,737 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 41 [2022-03-20 20:58:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:37,738 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2022-03-20 20:58:37,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 20:58:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2022-03-20 20:58:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 20:58:37,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:37,738 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:37,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:37,956 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 [2022-03-20 20:58:37,957 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2022-03-20 20:58:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:37,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [505809557] [2022-03-20 20:58:37,958 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:37,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 2 times [2022-03-20 20:58:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:37,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949936417] [2022-03-20 20:58:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:37,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:37,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476083126] [2022-03-20 20:58:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:37,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:37,969 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) [2022-03-20 20:58:37,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 20:58:38,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:38,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:38,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:58:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 20:58:38,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:38,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:38,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949936417] [2022-03-20 20:58:38,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:38,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476083126] [2022-03-20 20:58:38,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476083126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:38,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:38,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:38,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:38,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [505809557] [2022-03-20 20:58:38,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [505809557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:38,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:38,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:38,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933297074] [2022-03-20 20:58:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:38,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:38,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:38,073 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 20:58:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:38,114 INFO L93 Difference]: Finished difference Result 261 states and 367 transitions. [2022-03-20 20:58:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:58:38,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-20 20:58:38,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:38,127 INFO L225 Difference]: With dead ends: 261 [2022-03-20 20:58:38,127 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 20:58:38,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:38,128 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:38,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 169 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 20:58:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 228. [2022-03-20 20:58:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 161 states have (on average 1.329192546583851) internal successors, (214), 167 states have internal predecessors, (214), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 20:58:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 318 transitions. [2022-03-20 20:58:38,145 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 318 transitions. Word has length 44 [2022-03-20 20:58:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:38,145 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 318 transitions. [2022-03-20 20:58:38,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 20:58:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 318 transitions. [2022-03-20 20:58:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 20:58:38,145 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:38,145 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:38,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:38,363 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 [2022-03-20 20:58:38,364 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2022-03-20 20:58:38,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:38,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1221591605] [2022-03-20 20:58:38,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:38,365 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 2 times [2022-03-20 20:58:38,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:38,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536947896] [2022-03-20 20:58:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:38,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:38,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:38,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640157963] [2022-03-20 20:58:38,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:38,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:38,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:38,379 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) [2022-03-20 20:58:38,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 20:58:38,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:38,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:58:38,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:38,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:38,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:38,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536947896] [2022-03-20 20:58:38,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:38,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640157963] [2022-03-20 20:58:38,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640157963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:38,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:38,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 20:58:38,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:38,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1221591605] [2022-03-20 20:58:38,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1221591605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:38,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:38,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:38,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675500128] [2022-03-20 20:58:38,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:38,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:38,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:38,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:38,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:58:38,613 INFO L87 Difference]: Start difference. First operand 228 states and 318 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:38,687 INFO L93 Difference]: Finished difference Result 429 states and 607 transitions. [2022-03-20 20:58:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:58:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-20 20:58:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:38,689 INFO L225 Difference]: With dead ends: 429 [2022-03-20 20:58:38,689 INFO L226 Difference]: Without dead ends: 264 [2022-03-20 20:58:38,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:38,690 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:38,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 203 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-20 20:58:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-03-20 20:58:38,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 189 states have internal predecessors, (239), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 20:58:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2022-03-20 20:58:38,708 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 42 [2022-03-20 20:58:38,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:38,708 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2022-03-20 20:58:38,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2022-03-20 20:58:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 20:58:38,709 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:38,709 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:38,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:38,926 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 [2022-03-20 20:58:38,926 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:38,926 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2022-03-20 20:58:38,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:38,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390582407] [2022-03-20 20:58:38,927 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 2 times [2022-03-20 20:58:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:38,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079090487] [2022-03-20 20:58:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:38,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:38,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:38,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57906603] [2022-03-20 20:58:38,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:38,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:38,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:38,934 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) [2022-03-20 20:58:38,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 20:58:38,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:38,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:38,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:58:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 20:58:39,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:39,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:39,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079090487] [2022-03-20 20:58:39,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:39,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57906603] [2022-03-20 20:58:39,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57906603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:39,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:39,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:39,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390582407] [2022-03-20 20:58:39,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390582407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:39,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:39,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:39,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665250786] [2022-03-20 20:58:39,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:39,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:39,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:39,067 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:39,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:39,107 INFO L93 Difference]: Finished difference Result 332 states and 473 transitions. [2022-03-20 20:58:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:58:39,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-03-20 20:58:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:39,109 INFO L225 Difference]: With dead ends: 332 [2022-03-20 20:58:39,109 INFO L226 Difference]: Without dead ends: 330 [2022-03-20 20:58:39,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:39,110 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:39,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 158 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-20 20:58:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-03-20 20:58:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 213 states have (on average 1.3427230046948357) internal successors, (286), 223 states have internal predecessors, (286), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 20:58:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 462 transitions. [2022-03-20 20:58:39,132 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 462 transitions. Word has length 46 [2022-03-20 20:58:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:39,132 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 462 transitions. [2022-03-20 20:58:39,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 462 transitions. [2022-03-20 20:58:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 20:58:39,133 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:39,133 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:39,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:39,365 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 [2022-03-20 20:58:39,366 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:39,366 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 1 times [2022-03-20 20:58:39,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:39,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045308649] [2022-03-20 20:58:39,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:39,367 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 2 times [2022-03-20 20:58:39,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:39,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900683064] [2022-03-20 20:58:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:39,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:39,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:39,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381685204] [2022-03-20 20:58:39,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:39,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:39,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:39,377 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) [2022-03-20 20:58:39,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 20:58:39,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:39,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:39,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:58:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:39,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:39,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:39,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900683064] [2022-03-20 20:58:39,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:39,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381685204] [2022-03-20 20:58:39,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381685204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:39,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:39,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 20:58:39,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:39,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045308649] [2022-03-20 20:58:39,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045308649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:39,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:39,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:39,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973151593] [2022-03-20 20:58:39,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:39,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:39,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:58:39,608 INFO L87 Difference]: Start difference. First operand 321 states and 462 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:39,674 INFO L93 Difference]: Finished difference Result 335 states and 475 transitions. [2022-03-20 20:58:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:58:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2022-03-20 20:58:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:39,676 INFO L225 Difference]: With dead ends: 335 [2022-03-20 20:58:39,676 INFO L226 Difference]: Without dead ends: 328 [2022-03-20 20:58:39,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:39,677 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 53 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:39,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 186 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-20 20:58:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2022-03-20 20:58:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 216 states have (on average 1.337962962962963) internal successors, (289), 226 states have internal predecessors, (289), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 20:58:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 465 transitions. [2022-03-20 20:58:39,719 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 465 transitions. Word has length 57 [2022-03-20 20:58:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:39,719 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 465 transitions. [2022-03-20 20:58:39,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 465 transitions. [2022-03-20 20:58:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 20:58:39,720 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:39,720 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:39,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:39,936 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 [2022-03-20 20:58:39,936 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2022-03-20 20:58:39,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:39,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [601113626] [2022-03-20 20:58:39,937 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:39,937 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 2 times [2022-03-20 20:58:39,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:39,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614991914] [2022-03-20 20:58:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:39,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:39,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:39,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351608877] [2022-03-20 20:58:39,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:39,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:39,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:39,944 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) [2022-03-20 20:58:39,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 20:58:39,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:39,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:39,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 20:58:39,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:58:40,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:58:41,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:41,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614991914] [2022-03-20 20:58:41,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:41,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351608877] [2022-03-20 20:58:41,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351608877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:41,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:41,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 20:58:41,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:41,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [601113626] [2022-03-20 20:58:41,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [601113626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:41,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:41,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:58:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588154012] [2022-03-20 20:58:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:41,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:58:41,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:41,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:58:41,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:58:41,192 INFO L87 Difference]: Start difference. First operand 324 states and 465 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:41,530 INFO L93 Difference]: Finished difference Result 384 states and 559 transitions. [2022-03-20 20:58:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:58:41,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2022-03-20 20:58:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:41,532 INFO L225 Difference]: With dead ends: 384 [2022-03-20 20:58:41,532 INFO L226 Difference]: Without dead ends: 381 [2022-03-20 20:58:41,532 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:58:41,532 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:41,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 474 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:58:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-20 20:58:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-03-20 20:58:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 243 states have (on average 1.345679012345679) internal successors, (327), 256 states have internal predecessors, (327), 113 states have call successors, (113), 21 states have call predecessors, (113), 20 states have return successors, (111), 99 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-20 20:58:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 551 transitions. [2022-03-20 20:58:41,560 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 551 transitions. Word has length 58 [2022-03-20 20:58:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:41,561 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 551 transitions. [2022-03-20 20:58:41,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 551 transitions. [2022-03-20 20:58:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 20:58:41,561 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:41,561 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:41,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:41,778 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 [2022-03-20 20:58:41,778 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:41,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2022-03-20 20:58:41,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:41,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [413003300] [2022-03-20 20:58:41,779 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:41,779 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 2 times [2022-03-20 20:58:41,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:41,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072975412] [2022-03-20 20:58:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:41,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:41,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248492976] [2022-03-20 20:58:41,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:41,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:41,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:41,786 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) [2022-03-20 20:58:41,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 20:58:41,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:41,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:41,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:58:41,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:41,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:42,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072975412] [2022-03-20 20:58:42,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248492976] [2022-03-20 20:58:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248492976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:42,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:42,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 20:58:42,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [413003300] [2022-03-20 20:58:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [413003300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:42,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:42,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:58:42,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781331273] [2022-03-20 20:58:42,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:42,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:58:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:58:42,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:42,062 INFO L87 Difference]: Start difference. First operand 377 states and 551 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:42,177 INFO L93 Difference]: Finished difference Result 604 states and 873 transitions. [2022-03-20 20:58:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:58:42,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2022-03-20 20:58:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:42,179 INFO L225 Difference]: With dead ends: 604 [2022-03-20 20:58:42,179 INFO L226 Difference]: Without dead ends: 440 [2022-03-20 20:58:42,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:58:42,180 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 69 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:42,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 216 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-20 20:58:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2022-03-20 20:58:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 279 states have (on average 1.3118279569892473) internal successors, (366), 290 states have internal predecessors, (366), 117 states have call successors, (117), 30 states have call predecessors, (117), 29 states have return successors, (115), 105 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-20 20:58:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 598 transitions. [2022-03-20 20:58:42,210 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 598 transitions. Word has length 63 [2022-03-20 20:58:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:42,210 INFO L478 AbstractCegarLoop]: Abstraction has 426 states and 598 transitions. [2022-03-20 20:58:42,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 598 transitions. [2022-03-20 20:58:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 20:58:42,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:42,211 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:42,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:42,427 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 [2022-03-20 20:58:42,427 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 3 times [2022-03-20 20:58:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:42,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1693139294] [2022-03-20 20:58:42,428 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 4 times [2022-03-20 20:58:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:42,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442762843] [2022-03-20 20:58:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:42,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:42,441 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:42,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498797410] [2022-03-20 20:58:42,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:42,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:42,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:42,447 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) [2022-03-20 20:58:42,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 20:58:42,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:42,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 20:58:42,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:42,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:42,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442762843] [2022-03-20 20:58:42,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:42,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498797410] [2022-03-20 20:58:42,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498797410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:42,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:42,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 20:58:42,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:42,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1693139294] [2022-03-20 20:58:42,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1693139294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:42,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:42,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:58:42,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348686293] [2022-03-20 20:58:42,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:42,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:58:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:42,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:58:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:58:42,772 INFO L87 Difference]: Start difference. First operand 426 states and 598 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:42,901 INFO L93 Difference]: Finished difference Result 531 states and 722 transitions. [2022-03-20 20:58:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:58:42,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2022-03-20 20:58:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:42,904 INFO L225 Difference]: With dead ends: 531 [2022-03-20 20:58:42,904 INFO L226 Difference]: Without dead ends: 524 [2022-03-20 20:58:42,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=274, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:58:42,905 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 108 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:42,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 240 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-20 20:58:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 503. [2022-03-20 20:58:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 330 states have (on average 1.290909090909091) internal successors, (426), 346 states have internal predecessors, (426), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 20:58:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 691 transitions. [2022-03-20 20:58:42,952 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 691 transitions. Word has length 64 [2022-03-20 20:58:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:42,952 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 691 transitions. [2022-03-20 20:58:42,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 691 transitions. [2022-03-20 20:58:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 20:58:42,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:42,953 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:42,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:43,169 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 [2022-03-20 20:58:43,169 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:43,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2022-03-20 20:58:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:43,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488932159] [2022-03-20 20:58:43,170 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 2 times [2022-03-20 20:58:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:43,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572871317] [2022-03-20 20:58:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:43,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:43,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:43,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367554453] [2022-03-20 20:58:43,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:43,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:43,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:43,177 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) [2022-03-20 20:58:43,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 20:58:43,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:43,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 20:58:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 20:58:43,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 20:58:43,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:43,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572871317] [2022-03-20 20:58:43,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:43,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367554453] [2022-03-20 20:58:43,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367554453] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:58:43,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:58:43,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 20:58:43,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:43,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488932159] [2022-03-20 20:58:43,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488932159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:43,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:43,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:43,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291492213] [2022-03-20 20:58:43,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:43,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:43,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:43,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:58:43,484 INFO L87 Difference]: Start difference. First operand 503 states and 691 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:43,546 INFO L93 Difference]: Finished difference Result 517 states and 704 transitions. [2022-03-20 20:58:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:58:43,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-20 20:58:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:43,548 INFO L225 Difference]: With dead ends: 517 [2022-03-20 20:58:43,548 INFO L226 Difference]: Without dead ends: 515 [2022-03-20 20:58:43,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:58:43,549 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:43,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-20 20:58:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2022-03-20 20:58:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 336 states have (on average 1.2797619047619047) internal successors, (430), 352 states have internal predecessors, (430), 134 states have call successors, (134), 41 states have call predecessors, (134), 40 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 20:58:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 695 transitions. [2022-03-20 20:58:43,611 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 695 transitions. Word has length 67 [2022-03-20 20:58:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:43,612 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 695 transitions. [2022-03-20 20:58:43,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 695 transitions. [2022-03-20 20:58:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 20:58:43,612 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:43,612 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:43,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 20:58:43,828 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 [2022-03-20 20:58:43,829 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:43,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 3 times [2022-03-20 20:58:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:43,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159780690] [2022-03-20 20:58:43,830 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 4 times [2022-03-20 20:58:43,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:43,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110657545] [2022-03-20 20:58:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:43,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:43,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695727246] [2022-03-20 20:58:43,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:43,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:43,838 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) [2022-03-20 20:58:43,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 20:58:43,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:43,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:43,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 20:58:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:43,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:44,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:44,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110657545] [2022-03-20 20:58:44,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:44,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695727246] [2022-03-20 20:58:44,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695727246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:44,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:44,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-20 20:58:44,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:44,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159780690] [2022-03-20 20:58:44,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159780690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:44,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:44,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:44,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449033263] [2022-03-20 20:58:44,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:44,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:44,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:44,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:44,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:58:44,057 INFO L87 Difference]: Start difference. First operand 511 states and 695 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:44,373 INFO L93 Difference]: Finished difference Result 857 states and 1271 transitions. [2022-03-20 20:58:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:58:44,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-03-20 20:58:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:44,376 INFO L225 Difference]: With dead ends: 857 [2022-03-20 20:58:44,376 INFO L226 Difference]: Without dead ends: 850 [2022-03-20 20:58:44,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:58:44,377 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 81 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:44,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 572 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:58:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-03-20 20:58:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 567. [2022-03-20 20:58:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.3) internal successors, (494), 395 states have internal predecessors, (494), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-20 20:58:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 783 transitions. [2022-03-20 20:58:44,463 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 783 transitions. Word has length 65 [2022-03-20 20:58:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:44,463 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 783 transitions. [2022-03-20 20:58:44,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 783 transitions. [2022-03-20 20:58:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 20:58:44,463 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:44,464 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:44,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:44,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 20:58:44,675 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:44,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:44,676 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2022-03-20 20:58:44,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:44,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1699118613] [2022-03-20 20:58:44,676 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:44,676 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 2 times [2022-03-20 20:58:44,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:44,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623674757] [2022-03-20 20:58:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:44,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:44,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:44,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984292205] [2022-03-20 20:58:44,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:44,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:44,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:44,688 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:44,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 20:58:44,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:44,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:44,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:58:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:44,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:44,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623674757] [2022-03-20 20:58:44,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984292205] [2022-03-20 20:58:44,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984292205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:44,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:44,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 20:58:44,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1699118613] [2022-03-20 20:58:44,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1699118613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:44,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:44,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:58:44,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152605658] [2022-03-20 20:58:44,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:44,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:58:44,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:58:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:44,968 INFO L87 Difference]: Start difference. First operand 567 states and 783 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:45,089 INFO L93 Difference]: Finished difference Result 839 states and 1203 transitions. [2022-03-20 20:58:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:58:45,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-03-20 20:58:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:45,092 INFO L225 Difference]: With dead ends: 839 [2022-03-20 20:58:45,092 INFO L226 Difference]: Without dead ends: 567 [2022-03-20 20:58:45,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:58:45,093 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 63 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:45,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 221 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-20 20:58:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-03-20 20:58:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.2894736842105263) internal successors, (490), 395 states have internal predecessors, (490), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-20 20:58:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 779 transitions. [2022-03-20 20:58:45,137 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 779 transitions. Word has length 65 [2022-03-20 20:58:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:45,138 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 779 transitions. [2022-03-20 20:58:45,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 779 transitions. [2022-03-20 20:58:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:58:45,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:45,139 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:45,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:45,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 20:58:45,354 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2022-03-20 20:58:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:45,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1875607074] [2022-03-20 20:58:45,354 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 2 times [2022-03-20 20:58:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:45,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919564902] [2022-03-20 20:58:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:45,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:45,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197572985] [2022-03-20 20:58:45,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:45,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:45,380 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:45,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 20:58:45,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:45,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 20:58:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-20 20:58:45,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:45,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:45,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919564902] [2022-03-20 20:58:45,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:45,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197572985] [2022-03-20 20:58:45,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197572985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:45,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:45,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:45,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:45,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1875607074] [2022-03-20 20:58:45,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1875607074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:45,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:45,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163969676] [2022-03-20 20:58:45,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:45,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:45,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:45,515 INFO L87 Difference]: Start difference. First operand 567 states and 779 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:45,612 INFO L93 Difference]: Finished difference Result 980 states and 1387 transitions. [2022-03-20 20:58:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:58:45,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-03-20 20:58:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:45,615 INFO L225 Difference]: With dead ends: 980 [2022-03-20 20:58:45,615 INFO L226 Difference]: Without dead ends: 624 [2022-03-20 20:58:45,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:45,616 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:45,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 127 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-03-20 20:58:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 568. [2022-03-20 20:58:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 395 states have (on average 1.3012658227848102) internal successors, (514), 400 states have internal predecessors, (514), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 20:58:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 779 transitions. [2022-03-20 20:58:45,675 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 779 transitions. Word has length 69 [2022-03-20 20:58:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:45,676 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 779 transitions. [2022-03-20 20:58:45,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 779 transitions. [2022-03-20 20:58:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:58:45,676 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:45,676 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:45,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:45,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:45,893 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:45,893 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 3 times [2022-03-20 20:58:45,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:45,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [903179432] [2022-03-20 20:58:45,893 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:45,893 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 4 times [2022-03-20 20:58:45,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:45,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963000885] [2022-03-20 20:58:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:45,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:45,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:45,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571982164] [2022-03-20 20:58:45,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:45,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:45,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:45,902 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:45,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 20:58:45,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:45,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 20:58:45,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:46,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:46,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:46,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963000885] [2022-03-20 20:58:46,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:46,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571982164] [2022-03-20 20:58:46,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571982164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:46,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:46,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 20:58:46,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:46,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [903179432] [2022-03-20 20:58:46,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [903179432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:46,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:46,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:58:46,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917623591] [2022-03-20 20:58:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:46,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:58:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:58:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:58:46,242 INFO L87 Difference]: Start difference. First operand 568 states and 779 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:46,389 INFO L93 Difference]: Finished difference Result 914 states and 1304 transitions. [2022-03-20 20:58:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:58:46,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-03-20 20:58:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:46,391 INFO L225 Difference]: With dead ends: 914 [2022-03-20 20:58:46,391 INFO L226 Difference]: Without dead ends: 584 [2022-03-20 20:58:46,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:58:46,392 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 101 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:46,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 238 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-20 20:58:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 575. [2022-03-20 20:58:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 402 states have (on average 1.2960199004975124) internal successors, (521), 404 states have internal predecessors, (521), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 20:58:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 786 transitions. [2022-03-20 20:58:46,440 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 786 transitions. Word has length 69 [2022-03-20 20:58:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:46,440 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 786 transitions. [2022-03-20 20:58:46,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 786 transitions. [2022-03-20 20:58:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 20:58:46,441 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:46,441 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:46,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:46,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:46,654 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:46,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:46,654 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 3 times [2022-03-20 20:58:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:46,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [985284734] [2022-03-20 20:58:46,655 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 4 times [2022-03-20 20:58:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:46,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877001210] [2022-03-20 20:58:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:46,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:46,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:46,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870791520] [2022-03-20 20:58:46,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:46,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:46,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:46,676 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:46,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 20:58:46,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:46,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:46,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 20:58:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:46,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877001210] [2022-03-20 20:58:47,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:47,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870791520] [2022-03-20 20:58:47,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870791520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:47,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:47,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 20:58:47,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:47,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [985284734] [2022-03-20 20:58:47,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [985284734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:47,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:47,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:58:47,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808163065] [2022-03-20 20:58:47,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:47,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:58:47,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:47,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:58:47,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:58:47,042 INFO L87 Difference]: Start difference. First operand 575 states and 786 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:47,231 INFO L93 Difference]: Finished difference Result 918 states and 1274 transitions. [2022-03-20 20:58:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:58:47,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2022-03-20 20:58:47,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:47,233 INFO L225 Difference]: With dead ends: 918 [2022-03-20 20:58:47,233 INFO L226 Difference]: Without dead ends: 688 [2022-03-20 20:58:47,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=244, Invalid=356, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:58:47,234 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 124 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:47,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 278 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-20 20:58:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 658. [2022-03-20 20:58:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 457 states have (on average 1.2735229759299782) internal successors, (582), 460 states have internal predecessors, (582), 151 states have call successors, (151), 50 states have call predecessors, (151), 49 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-20 20:58:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 880 transitions. [2022-03-20 20:58:47,287 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 880 transitions. Word has length 70 [2022-03-20 20:58:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:47,287 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 880 transitions. [2022-03-20 20:58:47,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 880 transitions. [2022-03-20 20:58:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 20:58:47,288 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:47,288 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:47,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:47,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 20:58:47,505 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:47,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2022-03-20 20:58:47,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:47,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027150998] [2022-03-20 20:58:47,505 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:47,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 2 times [2022-03-20 20:58:47,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:47,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971802523] [2022-03-20 20:58:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:47,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:47,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:47,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691625565] [2022-03-20 20:58:47,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:47,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:47,511 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:47,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 20:58:47,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:47,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:47,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 20:58:47,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 20:58:47,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 20:58:47,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971802523] [2022-03-20 20:58:47,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691625565] [2022-03-20 20:58:47,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691625565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:47,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:47,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:58:47,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027150998] [2022-03-20 20:58:47,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027150998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:47,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:47,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:47,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140827727] [2022-03-20 20:58:47,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:47,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:47,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:58:47,776 INFO L87 Difference]: Start difference. First operand 658 states and 880 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:47,973 INFO L93 Difference]: Finished difference Result 757 states and 1022 transitions. [2022-03-20 20:58:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:58:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-03-20 20:58:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:47,976 INFO L225 Difference]: With dead ends: 757 [2022-03-20 20:58:47,976 INFO L226 Difference]: Without dead ends: 755 [2022-03-20 20:58:47,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:58:47,976 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:47,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-20 20:58:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 748. [2022-03-20 20:58:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 537 states have (on average 1.297951582867784) internal successors, (697), 546 states have internal predecessors, (697), 160 states have call successors, (160), 51 states have call predecessors, (160), 50 states have return successors, (156), 150 states have call predecessors, (156), 156 states have call successors, (156) [2022-03-20 20:58:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1013 transitions. [2022-03-20 20:58:48,050 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1013 transitions. Word has length 70 [2022-03-20 20:58:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:48,050 INFO L478 AbstractCegarLoop]: Abstraction has 748 states and 1013 transitions. [2022-03-20 20:58:48,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:58:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1013 transitions. [2022-03-20 20:58:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 20:58:48,051 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:48,051 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:48,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:48,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 20:58:48,267 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:48,267 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2022-03-20 20:58:48,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:48,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2003688244] [2022-03-20 20:58:48,268 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:48,268 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 4 times [2022-03-20 20:58:48,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:48,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070311688] [2022-03-20 20:58:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:48,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:48,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:48,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619803122] [2022-03-20 20:58:48,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:48,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:48,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:48,274 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:48,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 20:58:48,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:48,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 20:58:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 20:58:48,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-20 20:58:49,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:49,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070311688] [2022-03-20 20:58:49,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:49,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619803122] [2022-03-20 20:58:49,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619803122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:49,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:49,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-03-20 20:58:49,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:49,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2003688244] [2022-03-20 20:58:49,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2003688244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:49,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:49,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:58:49,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997092020] [2022-03-20 20:58:49,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:49,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:58:49,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:58:49,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:58:49,241 INFO L87 Difference]: Start difference. First operand 748 states and 1013 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 20:58:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:49,676 INFO L93 Difference]: Finished difference Result 840 states and 1136 transitions. [2022-03-20 20:58:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:58:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 75 [2022-03-20 20:58:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:49,679 INFO L225 Difference]: With dead ends: 840 [2022-03-20 20:58:49,679 INFO L226 Difference]: Without dead ends: 838 [2022-03-20 20:58:49,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:58:49,680 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 75 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:49,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 588 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:58:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-20 20:58:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 813. [2022-03-20 20:58:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 579 states have (on average 1.302245250431779) internal successors, (754), 589 states have internal predecessors, (754), 178 states have call successors, (178), 56 states have call predecessors, (178), 55 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-20 20:58:49,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1106 transitions. [2022-03-20 20:58:49,757 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1106 transitions. Word has length 75 [2022-03-20 20:58:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:49,757 INFO L478 AbstractCegarLoop]: Abstraction has 813 states and 1106 transitions. [2022-03-20 20:58:49,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 20:58:49,757 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1106 transitions. [2022-03-20 20:58:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 20:58:49,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:49,758 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:49,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:49,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 20:58:49,973 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:49,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:49,973 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 5 times [2022-03-20 20:58:49,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:49,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1545048837] [2022-03-20 20:58:49,974 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:49,974 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 6 times [2022-03-20 20:58:49,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:49,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158138601] [2022-03-20 20:58:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:49,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:49,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:49,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885827983] [2022-03-20 20:58:49,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:58:49,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:49,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:49,981 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:49,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 20:58:50,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:58:50,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 20:58:50,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:50,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:50,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:50,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158138601] [2022-03-20 20:58:50,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:50,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885827983] [2022-03-20 20:58:50,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885827983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:50,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:50,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 20:58:50,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:50,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1545048837] [2022-03-20 20:58:50,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1545048837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:50,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:50,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:58:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598738045] [2022-03-20 20:58:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:50,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:58:50,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:58:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:58:50,388 INFO L87 Difference]: Start difference. First operand 813 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:50,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:50,647 INFO L93 Difference]: Finished difference Result 1433 states and 1997 transitions. [2022-03-20 20:58:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:58:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2022-03-20 20:58:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:50,651 INFO L225 Difference]: With dead ends: 1433 [2022-03-20 20:58:50,651 INFO L226 Difference]: Without dead ends: 975 [2022-03-20 20:58:50,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:58:50,652 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 145 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:50,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 307 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-20 20:58:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 947. [2022-03-20 20:58:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 673 states have (on average 1.274888558692422) internal successors, (858), 683 states have internal predecessors, (858), 205 states have call successors, (205), 69 states have call predecessors, (205), 68 states have return successors, (200), 194 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-20 20:58:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1263 transitions. [2022-03-20 20:58:50,743 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1263 transitions. Word has length 76 [2022-03-20 20:58:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:50,743 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1263 transitions. [2022-03-20 20:58:50,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1263 transitions. [2022-03-20 20:58:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 20:58:50,744 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:50,744 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:50,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:50,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 20:58:50,960 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2022-03-20 20:58:50,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:50,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373008957] [2022-03-20 20:58:50,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 2 times [2022-03-20 20:58:50,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:50,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545040411] [2022-03-20 20:58:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:50,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:50,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:50,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41277604] [2022-03-20 20:58:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:50,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:50,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:50,969 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:50,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 20:58:51,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:51,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:51,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 20:58:51,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 20:58:51,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 20:58:53,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545040411] [2022-03-20 20:58:53,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41277604] [2022-03-20 20:58:53,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41277604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:53,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:53,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-20 20:58:53,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373008957] [2022-03-20 20:58:53,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373008957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:53,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:53,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:58:53,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477560887] [2022-03-20 20:58:53,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:53,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:58:53,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:58:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:58:53,626 INFO L87 Difference]: Start difference. First operand 947 states and 1263 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 20:58:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:54,427 INFO L93 Difference]: Finished difference Result 1025 states and 1371 transitions. [2022-03-20 20:58:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:58:54,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2022-03-20 20:58:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:54,450 INFO L225 Difference]: With dead ends: 1025 [2022-03-20 20:58:54,450 INFO L226 Difference]: Without dead ends: 1022 [2022-03-20 20:58:54,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:58:54,451 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 76 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:54,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 553 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:58:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-03-20 20:58:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 957. [2022-03-20 20:58:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2695139911634756) internal successors, (862), 689 states have internal predecessors, (862), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-20 20:58:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1272 transitions. [2022-03-20 20:58:54,545 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1272 transitions. Word has length 81 [2022-03-20 20:58:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:54,546 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1272 transitions. [2022-03-20 20:58:54,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 20:58:54,546 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1272 transitions. [2022-03-20 20:58:54,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 20:58:54,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:54,546 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:54,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 20:58:54,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 20:58:54,764 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:54,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2022-03-20 20:58:54,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:54,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1612637063] [2022-03-20 20:58:54,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 2 times [2022-03-20 20:58:54,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:54,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130173995] [2022-03-20 20:58:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:54,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:54,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:54,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349770376] [2022-03-20 20:58:54,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:54,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:54,771 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:54,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 20:58:54,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:54,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:54,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 20:58:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:58:54,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:58:55,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:55,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130173995] [2022-03-20 20:58:55,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:55,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349770376] [2022-03-20 20:58:55,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349770376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:55,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:55,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 20:58:55,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:55,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1612637063] [2022-03-20 20:58:55,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1612637063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:55,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:55,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:58:55,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729520307] [2022-03-20 20:58:55,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:55,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:58:55,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:55,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:58:55,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:58:55,176 INFO L87 Difference]: Start difference. First operand 957 states and 1272 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:58:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:55,401 INFO L93 Difference]: Finished difference Result 966 states and 1279 transitions. [2022-03-20 20:58:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:58:55,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2022-03-20 20:58:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:55,405 INFO L225 Difference]: With dead ends: 966 [2022-03-20 20:58:55,405 INFO L226 Difference]: Without dead ends: 959 [2022-03-20 20:58:55,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=246, Invalid=354, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:58:55,406 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 125 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:55,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 280 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:55,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-20 20:58:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 957. [2022-03-20 20:58:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2665684830633284) internal successors, (860), 689 states have internal predecessors, (860), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-20 20:58:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1270 transitions. [2022-03-20 20:58:55,505 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1270 transitions. Word has length 87 [2022-03-20 20:58:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:55,506 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1270 transitions. [2022-03-20 20:58:55,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:58:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1270 transitions. [2022-03-20 20:58:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 20:58:55,506 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:55,506 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:55,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:55,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:55,728 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 3 times [2022-03-20 20:58:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:55,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263959335] [2022-03-20 20:58:55,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:55,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 4 times [2022-03-20 20:58:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:55,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944577741] [2022-03-20 20:58:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:55,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:55,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653715707] [2022-03-20 20:58:55,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:55,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:55,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:55,735 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:55,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 20:58:55,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:55,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:55,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 20:58:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 20:58:56,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 20:58:59,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:59,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944577741] [2022-03-20 20:58:59,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:59,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653715707] [2022-03-20 20:58:59,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653715707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:59,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:59,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-20 20:58:59,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:59,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263959335] [2022-03-20 20:58:59,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263959335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:59,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:59,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:58:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241939015] [2022-03-20 20:58:59,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:59,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:58:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:58:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:58:59,638 INFO L87 Difference]: Start difference. First operand 957 states and 1270 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:00,285 INFO L93 Difference]: Finished difference Result 1073 states and 1433 transitions. [2022-03-20 20:59:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:59:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2022-03-20 20:59:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:00,290 INFO L225 Difference]: With dead ends: 1073 [2022-03-20 20:59:00,291 INFO L226 Difference]: Without dead ends: 1070 [2022-03-20 20:59:00,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-03-20 20:59:00,292 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 91 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:00,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 844 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 20:59:00,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-20 20:59:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1027. [2022-03-20 20:59:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 723 states have (on average 1.2738589211618256) internal successors, (921), 734 states have internal predecessors, (921), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-20 20:59:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1375 transitions. [2022-03-20 20:59:00,454 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1375 transitions. Word has length 88 [2022-03-20 20:59:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:00,454 INFO L478 AbstractCegarLoop]: Abstraction has 1027 states and 1375 transitions. [2022-03-20 20:59:00,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1375 transitions. [2022-03-20 20:59:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 20:59:00,455 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:00,455 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:00,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:00,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 20:59:00,671 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 5 times [2022-03-20 20:59:00,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:00,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423637410] [2022-03-20 20:59:00,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 6 times [2022-03-20 20:59:00,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:00,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664353799] [2022-03-20 20:59:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:00,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:00,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:00,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295426190] [2022-03-20 20:59:00,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:00,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:00,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:00,685 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:00,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 20:59:00,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:59:00,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:00,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 20:59:00,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:00,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:01,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:01,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664353799] [2022-03-20 20:59:01,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:01,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295426190] [2022-03-20 20:59:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295426190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:01,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:01,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 20:59:01,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:01,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423637410] [2022-03-20 20:59:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423637410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:01,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:01,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:59:01,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733871449] [2022-03-20 20:59:01,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:01,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:59:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:01,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:59:01,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:59:01,155 INFO L87 Difference]: Start difference. First operand 1027 states and 1375 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:01,410 INFO L93 Difference]: Finished difference Result 1062 states and 1410 transitions. [2022-03-20 20:59:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:59:01,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2022-03-20 20:59:01,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:01,414 INFO L225 Difference]: With dead ends: 1062 [2022-03-20 20:59:01,414 INFO L226 Difference]: Without dead ends: 1055 [2022-03-20 20:59:01,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:01,415 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 170 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:01,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 293 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-03-20 20:59:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1038. [2022-03-20 20:59:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 734 states have (on average 1.2697547683923707) internal successors, (932), 745 states have internal predecessors, (932), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-20 20:59:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1386 transitions. [2022-03-20 20:59:01,541 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1386 transitions. Word has length 91 [2022-03-20 20:59:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:01,541 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1386 transitions. [2022-03-20 20:59:01,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1386 transitions. [2022-03-20 20:59:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 20:59:01,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:01,543 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:01,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:01,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:01,759 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:01,759 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2022-03-20 20:59:01,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:01,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [536225615] [2022-03-20 20:59:01,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 2 times [2022-03-20 20:59:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:01,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264805534] [2022-03-20 20:59:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:01,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:01,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:01,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089890173] [2022-03-20 20:59:01,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:01,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:01,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:01,768 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:01,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 20:59:01,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:01,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 20:59:01,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:01,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:02,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:02,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264805534] [2022-03-20 20:59:02,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:02,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089890173] [2022-03-20 20:59:02,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089890173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:02,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:02,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 20:59:02,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:02,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [536225615] [2022-03-20 20:59:02,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [536225615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:02,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:02,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:59:02,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903941778] [2022-03-20 20:59:02,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:02,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:59:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:59:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:59:02,189 INFO L87 Difference]: Start difference. First operand 1038 states and 1386 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:02,467 INFO L93 Difference]: Finished difference Result 1382 states and 1902 transitions. [2022-03-20 20:59:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:59:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2022-03-20 20:59:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:02,470 INFO L225 Difference]: With dead ends: 1382 [2022-03-20 20:59:02,470 INFO L226 Difference]: Without dead ends: 1062 [2022-03-20 20:59:02,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:02,472 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 155 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:02,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 301 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:02,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-03-20 20:59:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1058. [2022-03-20 20:59:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 754 states have (on average 1.2612732095490715) internal successors, (951), 765 states have internal predecessors, (951), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-20 20:59:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1405 transitions. [2022-03-20 20:59:02,579 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1405 transitions. Word has length 93 [2022-03-20 20:59:02,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:02,579 INFO L478 AbstractCegarLoop]: Abstraction has 1058 states and 1405 transitions. [2022-03-20 20:59:02,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1405 transitions. [2022-03-20 20:59:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 20:59:02,580 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:02,580 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:02,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:02,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:02,796 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 5 times [2022-03-20 20:59:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:02,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574144882] [2022-03-20 20:59:02,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 6 times [2022-03-20 20:59:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:02,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312886114] [2022-03-20 20:59:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:02,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:02,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270146559] [2022-03-20 20:59:02,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:02,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:02,805 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:02,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 20:59:02,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:59:02,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:02,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:59:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:03,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:03,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:03,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312886114] [2022-03-20 20:59:03,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:03,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270146559] [2022-03-20 20:59:03,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270146559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:03,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:03,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 20:59:03,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:03,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574144882] [2022-03-20 20:59:03,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574144882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:03,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:03,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:03,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948629155] [2022-03-20 20:59:03,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:03,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:03,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:03,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:03,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:03,354 INFO L87 Difference]: Start difference. First operand 1058 states and 1405 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:03,654 INFO L93 Difference]: Finished difference Result 1539 states and 2090 transitions. [2022-03-20 20:59:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 20:59:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-20 20:59:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:03,658 INFO L225 Difference]: With dead ends: 1539 [2022-03-20 20:59:03,659 INFO L226 Difference]: Without dead ends: 1219 [2022-03-20 20:59:03,659 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2022-03-20 20:59:03,660 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 187 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:03,660 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 327 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-03-20 20:59:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1164. [2022-03-20 20:59:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 812 states have (on average 1.2561576354679802) internal successors, (1020), 824 states have internal predecessors, (1020), 262 states have call successors, (262), 90 states have call predecessors, (262), 89 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2022-03-20 20:59:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1539 transitions. [2022-03-20 20:59:03,784 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1539 transitions. Word has length 97 [2022-03-20 20:59:03,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:03,784 INFO L478 AbstractCegarLoop]: Abstraction has 1164 states and 1539 transitions. [2022-03-20 20:59:03,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:03,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1539 transitions. [2022-03-20 20:59:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 20:59:03,786 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:03,786 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:03,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:04,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 20:59:04,003 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 7 times [2022-03-20 20:59:04,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:04,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1660812244] [2022-03-20 20:59:04,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 8 times [2022-03-20 20:59:04,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:04,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996015725] [2022-03-20 20:59:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:04,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:04,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:04,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531593566] [2022-03-20 20:59:04,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:04,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:04,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:04,009 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:04,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 20:59:04,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:04,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 20:59:04,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:04,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:04,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:04,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996015725] [2022-03-20 20:59:04,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:04,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531593566] [2022-03-20 20:59:04,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531593566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:04,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:04,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 20:59:04,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1660812244] [2022-03-20 20:59:04,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1660812244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:04,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:04,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:59:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544493402] [2022-03-20 20:59:04,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:04,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:59:04,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:59:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:04,444 INFO L87 Difference]: Start difference. First operand 1164 states and 1539 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:04,767 INFO L93 Difference]: Finished difference Result 1434 states and 1877 transitions. [2022-03-20 20:59:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 20:59:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2022-03-20 20:59:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:04,771 INFO L225 Difference]: With dead ends: 1434 [2022-03-20 20:59:04,771 INFO L226 Difference]: Without dead ends: 1427 [2022-03-20 20:59:04,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=407, Invalid=585, Unknown=0, NotChecked=0, Total=992 [2022-03-20 20:59:04,772 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 218 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:04,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 327 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-03-20 20:59:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1358. [2022-03-20 20:59:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 940 states have (on average 1.2446808510638299) internal successors, (1170), 965 states have internal predecessors, (1170), 311 states have call successors, (311), 107 states have call predecessors, (311), 106 states have return successors, (305), 285 states have call predecessors, (305), 305 states have call successors, (305) [2022-03-20 20:59:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1786 transitions. [2022-03-20 20:59:04,923 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1786 transitions. Word has length 98 [2022-03-20 20:59:04,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:04,924 INFO L478 AbstractCegarLoop]: Abstraction has 1358 states and 1786 transitions. [2022-03-20 20:59:04,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1786 transitions. [2022-03-20 20:59:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 20:59:04,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:04,942 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:04,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 20:59:05,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 20:59:05,159 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:05,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:05,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 1 times [2022-03-20 20:59:05,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:05,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [134073194] [2022-03-20 20:59:05,160 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 2 times [2022-03-20 20:59:05,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:05,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795511366] [2022-03-20 20:59:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:05,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:05,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:05,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287412603] [2022-03-20 20:59:05,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:05,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:05,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:05,168 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:05,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 20:59:05,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:05,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:05,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:59:05,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:05,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 39 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:05,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:05,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795511366] [2022-03-20 20:59:05,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:05,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287412603] [2022-03-20 20:59:05,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287412603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:05,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:05,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 20:59:05,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:05,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [134073194] [2022-03-20 20:59:05,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [134073194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:05,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:05,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:05,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196326810] [2022-03-20 20:59:05,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:05,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:05,586 INFO L87 Difference]: Start difference. First operand 1358 states and 1786 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:05,902 INFO L93 Difference]: Finished difference Result 1838 states and 2503 transitions. [2022-03-20 20:59:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 20:59:05,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2022-03-20 20:59:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:05,907 INFO L225 Difference]: With dead ends: 1838 [2022-03-20 20:59:05,907 INFO L226 Difference]: Without dead ends: 1358 [2022-03-20 20:59:05,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=383, Invalid=547, Unknown=0, NotChecked=0, Total=930 [2022-03-20 20:59:05,909 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 205 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:05,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 320 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-03-20 20:59:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1334. [2022-03-20 20:59:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 924 states have (on average 1.2272727272727273) internal successors, (1134), 948 states have internal predecessors, (1134), 304 states have call successors, (304), 106 states have call predecessors, (304), 105 states have return successors, (298), 279 states have call predecessors, (298), 298 states have call successors, (298) [2022-03-20 20:59:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1736 transitions. [2022-03-20 20:59:06,095 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1736 transitions. Word has length 99 [2022-03-20 20:59:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:06,095 INFO L478 AbstractCegarLoop]: Abstraction has 1334 states and 1736 transitions. [2022-03-20 20:59:06,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1736 transitions. [2022-03-20 20:59:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:59:06,096 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:06,096 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:06,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:06,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 20:59:06,296 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:06,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 5 times [2022-03-20 20:59:06,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:06,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [129874526] [2022-03-20 20:59:06,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:06,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 6 times [2022-03-20 20:59:06,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:06,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072343659] [2022-03-20 20:59:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:06,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:06,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:06,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495200248] [2022-03-20 20:59:06,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:06,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:06,304 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:06,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 20:59:06,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:59:06,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:06,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 20:59:06,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:06,940 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 57 proven. 35 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-03-20 20:59:07,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:07,171 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:07,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072343659] [2022-03-20 20:59:07,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495200248] [2022-03-20 20:59:07,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495200248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:59:07,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:59:07,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 20:59:07,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:07,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [129874526] [2022-03-20 20:59:07,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [129874526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:07,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:07,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:59:07,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424760031] [2022-03-20 20:59:07,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:07,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:59:07,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:07,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:59:07,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:59:07,292 INFO L87 Difference]: Start difference. First operand 1334 states and 1736 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:07,737 INFO L93 Difference]: Finished difference Result 1565 states and 2045 transitions. [2022-03-20 20:59:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:59:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 104 [2022-03-20 20:59:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:07,742 INFO L225 Difference]: With dead ends: 1565 [2022-03-20 20:59:07,742 INFO L226 Difference]: Without dead ends: 1556 [2022-03-20 20:59:07,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:59:07,754 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:07,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 403 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-03-20 20:59:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1518. [2022-03-20 20:59:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1051 states have (on average 1.2274024738344433) internal successors, (1290), 1078 states have internal predecessors, (1290), 350 states have call successors, (350), 118 states have call predecessors, (350), 116 states have return successors, (345), 321 states have call predecessors, (345), 345 states have call successors, (345) [2022-03-20 20:59:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 1985 transitions. [2022-03-20 20:59:07,941 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 1985 transitions. Word has length 104 [2022-03-20 20:59:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:07,942 INFO L478 AbstractCegarLoop]: Abstraction has 1518 states and 1985 transitions. [2022-03-20 20:59:07,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 1985 transitions. [2022-03-20 20:59:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 20:59:07,943 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:07,943 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:07,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:08,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:08,158 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:08,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1433350311, now seen corresponding path program 5 times [2022-03-20 20:59:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:08,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742204228] [2022-03-20 20:59:08,158 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1433350311, now seen corresponding path program 6 times [2022-03-20 20:59:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:08,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407465820] [2022-03-20 20:59:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:08,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:08,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389812760] [2022-03-20 20:59:08,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:08,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:08,166 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:08,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 20:59:08,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:59:08,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:08,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 20:59:08,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 40 proven. 73 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 20:59:08,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 66 proven. 47 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 20:59:09,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407465820] [2022-03-20 20:59:09,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389812760] [2022-03-20 20:59:09,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389812760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:09,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:09,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2022-03-20 20:59:09,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:09,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742204228] [2022-03-20 20:59:09,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742204228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:09,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:09,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:09,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85555821] [2022-03-20 20:59:09,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:09,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:09,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:09,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:09,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:59:09,082 INFO L87 Difference]: Start difference. First operand 1518 states and 1985 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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) [2022-03-20 20:59:10,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:10,006 INFO L93 Difference]: Finished difference Result 1833 states and 2418 transitions. [2022-03-20 20:59:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:59:10,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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 102 [2022-03-20 20:59:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:10,013 INFO L225 Difference]: With dead ends: 1833 [2022-03-20 20:59:10,013 INFO L226 Difference]: Without dead ends: 1831 [2022-03-20 20:59:10,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:10,017 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 148 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:10,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 838 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 20:59:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-03-20 20:59:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1765. [2022-03-20 20:59:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1240 states have (on average 1.2508064516129032) internal successors, (1551), 1274 states have internal predecessors, (1551), 397 states have call successors, (397), 129 states have call predecessors, (397), 127 states have return successors, (392), 361 states have call predecessors, (392), 392 states have call successors, (392) [2022-03-20 20:59:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2340 transitions. [2022-03-20 20:59:10,334 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2340 transitions. Word has length 102 [2022-03-20 20:59:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:10,334 INFO L478 AbstractCegarLoop]: Abstraction has 1765 states and 2340 transitions. [2022-03-20 20:59:10,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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) [2022-03-20 20:59:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2340 transitions. [2022-03-20 20:59:10,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 20:59:10,336 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:10,336 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:10,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:10,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 20:59:10,552 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:10,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2051750892, now seen corresponding path program 7 times [2022-03-20 20:59:10,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:10,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1165431734] [2022-03-20 20:59:10,553 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:10,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2051750892, now seen corresponding path program 8 times [2022-03-20 20:59:10,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:10,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876657720] [2022-03-20 20:59:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:10,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:10,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:10,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328832134] [2022-03-20 20:59:10,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:10,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:10,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:10,559 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:10,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 20:59:10,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:10,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:10,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 20:59:10,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:10,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:11,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876657720] [2022-03-20 20:59:11,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:11,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328832134] [2022-03-20 20:59:11,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328832134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:11,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:11,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 20:59:11,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:11,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1165431734] [2022-03-20 20:59:11,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1165431734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:11,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:11,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:59:11,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880979867] [2022-03-20 20:59:11,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:11,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:59:11,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:59:11,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:11,059 INFO L87 Difference]: Start difference. First operand 1765 states and 2340 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:11,553 INFO L93 Difference]: Finished difference Result 2634 states and 3640 transitions. [2022-03-20 20:59:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 20:59:11,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2022-03-20 20:59:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:11,559 INFO L225 Difference]: With dead ends: 2634 [2022-03-20 20:59:11,560 INFO L226 Difference]: Without dead ends: 1870 [2022-03-20 20:59:11,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-03-20 20:59:11,562 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 215 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:11,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 348 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-03-20 20:59:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1825. [2022-03-20 20:59:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1298 states have (on average 1.2496147919876734) internal successors, (1622), 1319 states have internal predecessors, (1622), 398 states have call successors, (398), 130 states have call predecessors, (398), 128 states have return successors, (393), 375 states have call predecessors, (393), 393 states have call successors, (393) [2022-03-20 20:59:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2413 transitions. [2022-03-20 20:59:11,821 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2413 transitions. Word has length 103 [2022-03-20 20:59:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:11,821 INFO L478 AbstractCegarLoop]: Abstraction has 1825 states and 2413 transitions. [2022-03-20 20:59:11,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2413 transitions. [2022-03-20 20:59:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:59:11,822 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:11,822 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:11,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:12,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 20:59:12,038 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:12,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1865093808, now seen corresponding path program 7 times [2022-03-20 20:59:12,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:12,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [257998946] [2022-03-20 20:59:12,039 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1865093808, now seen corresponding path program 8 times [2022-03-20 20:59:12,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:12,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034224309] [2022-03-20 20:59:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:12,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:12,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:12,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897650417] [2022-03-20 20:59:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:12,047 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:12,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 20:59:12,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:12,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 20:59:12,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 133 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:12,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 69 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:12,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:12,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034224309] [2022-03-20 20:59:12,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:12,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897650417] [2022-03-20 20:59:12,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897650417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:12,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:12,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-20 20:59:12,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:12,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [257998946] [2022-03-20 20:59:12,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [257998946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:12,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:12,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:59:12,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378901431] [2022-03-20 20:59:12,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:12,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:59:12,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:59:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:12,568 INFO L87 Difference]: Start difference. First operand 1825 states and 2413 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:13,117 INFO L93 Difference]: Finished difference Result 2758 states and 3762 transitions. [2022-03-20 20:59:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 20:59:13,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2022-03-20 20:59:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:13,145 INFO L225 Difference]: With dead ends: 2758 [2022-03-20 20:59:13,145 INFO L226 Difference]: Without dead ends: 2189 [2022-03-20 20:59:13,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=426, Invalid=630, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 20:59:13,147 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 248 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:13,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 359 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-03-20 20:59:13,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2064. [2022-03-20 20:59:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1436 states have (on average 1.2395543175487465) internal successors, (1780), 1459 states have internal predecessors, (1780), 474 states have call successors, (474), 155 states have call predecessors, (474), 153 states have return successors, (468), 449 states have call predecessors, (468), 468 states have call successors, (468) [2022-03-20 20:59:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2722 transitions. [2022-03-20 20:59:13,464 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2722 transitions. Word has length 104 [2022-03-20 20:59:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:13,464 INFO L478 AbstractCegarLoop]: Abstraction has 2064 states and 2722 transitions. [2022-03-20 20:59:13,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2722 transitions. [2022-03-20 20:59:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 20:59:13,465 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:13,465 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:13,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:13,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 20:59:13,666 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:13,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:13,666 INFO L85 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 7 times [2022-03-20 20:59:13,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:13,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [76068387] [2022-03-20 20:59:13,666 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 8 times [2022-03-20 20:59:13,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:13,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41516948] [2022-03-20 20:59:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:13,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:13,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:13,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437759268] [2022-03-20 20:59:13,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:13,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:13,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:13,673 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:13,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 20:59:13,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:13,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:13,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 20:59:13,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-20 20:59:14,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 20:59:15,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41516948] [2022-03-20 20:59:15,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437759268] [2022-03-20 20:59:15,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437759268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:15,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:15,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-20 20:59:15,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [76068387] [2022-03-20 20:59:15,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [76068387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:15,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:15,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:59:15,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191184164] [2022-03-20 20:59:15,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:15,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:59:15,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:15,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:59:15,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:15,556 INFO L87 Difference]: Start difference. First operand 2064 states and 2722 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 20:59:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:16,235 INFO L93 Difference]: Finished difference Result 2130 states and 2803 transitions. [2022-03-20 20:59:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:59:16,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 108 [2022-03-20 20:59:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:16,241 INFO L225 Difference]: With dead ends: 2130 [2022-03-20 20:59:16,241 INFO L226 Difference]: Without dead ends: 2125 [2022-03-20 20:59:16,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:16,241 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:16,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 594 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:59:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2022-03-20 20:59:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 2071. [2022-03-20 20:59:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1442 states have (on average 1.2371705963938973) internal successors, (1784), 1466 states have internal predecessors, (1784), 471 states have call successors, (471), 158 states have call predecessors, (471), 157 states have return successors, (466), 446 states have call predecessors, (466), 466 states have call successors, (466) [2022-03-20 20:59:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2721 transitions. [2022-03-20 20:59:16,542 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2721 transitions. Word has length 108 [2022-03-20 20:59:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:16,542 INFO L478 AbstractCegarLoop]: Abstraction has 2071 states and 2721 transitions. [2022-03-20 20:59:16,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 20:59:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2721 transitions. [2022-03-20 20:59:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 20:59:16,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:16,543 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:16,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:16,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 20:59:16,760 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:16,760 INFO L85 PathProgramCache]: Analyzing trace with hash -373909618, now seen corresponding path program 9 times [2022-03-20 20:59:16,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:16,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [896831616] [2022-03-20 20:59:16,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:16,761 INFO L85 PathProgramCache]: Analyzing trace with hash -373909618, now seen corresponding path program 10 times [2022-03-20 20:59:16,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:16,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160810324] [2022-03-20 20:59:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:16,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:16,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:16,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163385071] [2022-03-20 20:59:16,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:16,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:16,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:16,769 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:16,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 20:59:16,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:16,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:16,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 20:59:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 20:59:18,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-20 20:59:21,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:21,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160810324] [2022-03-20 20:59:21,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:21,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163385071] [2022-03-20 20:59:21,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163385071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:21,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:21,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-20 20:59:21,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [896831616] [2022-03-20 20:59:21,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [896831616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:21,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:21,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 20:59:21,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917082580] [2022-03-20 20:59:21,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:21,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 20:59:21,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:21,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 20:59:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 20:59:21,354 INFO L87 Difference]: Start difference. First operand 2071 states and 2721 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 20:59:23,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:23,100 INFO L93 Difference]: Finished difference Result 2221 states and 2903 transitions. [2022-03-20 20:59:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 20:59:23,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 111 [2022-03-20 20:59:23,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:23,105 INFO L225 Difference]: With dead ends: 2221 [2022-03-20 20:59:23,105 INFO L226 Difference]: Without dead ends: 2218 [2022-03-20 20:59:23,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 20:59:23,106 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 139 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:23,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 923 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 20:59:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-03-20 20:59:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2137. [2022-03-20 20:59:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 1487 states have (on average 1.2313382649630127) internal successors, (1831), 1511 states have internal predecessors, (1831), 479 states have call successors, (479), 171 states have call predecessors, (479), 170 states have return successors, (474), 454 states have call predecessors, (474), 474 states have call successors, (474) [2022-03-20 20:59:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2784 transitions. [2022-03-20 20:59:23,427 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2784 transitions. Word has length 111 [2022-03-20 20:59:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:23,427 INFO L478 AbstractCegarLoop]: Abstraction has 2137 states and 2784 transitions. [2022-03-20 20:59:23,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 20:59:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2784 transitions. [2022-03-20 20:59:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 20:59:23,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:23,428 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:23,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:23,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:23,645 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:23,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1182187798, now seen corresponding path program 7 times [2022-03-20 20:59:23,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:23,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1941966698] [2022-03-20 20:59:23,645 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:23,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1182187798, now seen corresponding path program 8 times [2022-03-20 20:59:23,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:23,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571514950] [2022-03-20 20:59:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:23,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:23,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:23,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484935062] [2022-03-20 20:59:23,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:23,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:23,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:23,660 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:23,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 20:59:23,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:23,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-20 20:59:23,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:25,458 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:25,460 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 47 proven. 113 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 20:59:25,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-20 20:59:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571514950] [2022-03-20 20:59:26,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484935062] [2022-03-20 20:59:26,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484935062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:26,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:26,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 28 [2022-03-20 20:59:26,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1941966698] [2022-03-20 20:59:26,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1941966698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:26,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:26,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 20:59:26,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982161814] [2022-03-20 20:59:26,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:26,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 20:59:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 20:59:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:26,287 INFO L87 Difference]: Start difference. First operand 2137 states and 2784 transitions. Second operand has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-20 20:59:28,536 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 [] [2022-03-20 20:59:30,247 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:59:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:31,036 INFO L93 Difference]: Finished difference Result 2272 states and 2960 transitions. [2022-03-20 20:59:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 20:59:31,036 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 109 [2022-03-20 20:59:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:31,041 INFO L225 Difference]: With dead ends: 2272 [2022-03-20 20:59:31,041 INFO L226 Difference]: Without dead ends: 2270 [2022-03-20 20:59:31,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 20:59:31,042 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 126 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:31,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 995 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1023 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-03-20 20:59:31,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2022-03-20 20:59:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2212. [2022-03-20 20:59:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1537 states have (on average 1.2335718932986337) internal successors, (1896), 1562 states have internal predecessors, (1896), 497 states have call successors, (497), 178 states have call predecessors, (497), 177 states have return successors, (492), 471 states have call predecessors, (492), 492 states have call successors, (492) [2022-03-20 20:59:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2885 transitions. [2022-03-20 20:59:31,381 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2885 transitions. Word has length 109 [2022-03-20 20:59:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:31,381 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2885 transitions. [2022-03-20 20:59:31,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-20 20:59:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2885 transitions. [2022-03-20 20:59:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 20:59:31,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:31,383 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:31,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 20:59:31,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:31,589 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:31,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1720519159, now seen corresponding path program 9 times [2022-03-20 20:59:31,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:31,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1410706618] [2022-03-20 20:59:31,590 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1720519159, now seen corresponding path program 10 times [2022-03-20 20:59:31,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:31,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480841708] [2022-03-20 20:59:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:31,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:31,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:31,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224367583] [2022-03-20 20:59:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:31,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:31,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:31,598 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:31,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 20:59:31,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:31,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:31,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 20:59:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:31,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 78 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:32,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:32,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480841708] [2022-03-20 20:59:32,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:32,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224367583] [2022-03-20 20:59:32,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224367583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:32,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:32,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-20 20:59:32,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1410706618] [2022-03-20 20:59:32,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1410706618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:32,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:32,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:59:32,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920818595] [2022-03-20 20:59:32,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:32,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:59:32,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:32,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:59:32,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:32,128 INFO L87 Difference]: Start difference. First operand 2212 states and 2885 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:32,798 INFO L93 Difference]: Finished difference Result 3498 states and 4737 transitions. [2022-03-20 20:59:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 20:59:32,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 110 [2022-03-20 20:59:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:32,804 INFO L225 Difference]: With dead ends: 3498 [2022-03-20 20:59:32,804 INFO L226 Difference]: Without dead ends: 2692 [2022-03-20 20:59:32,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=446, Invalid=676, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 20:59:32,806 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 341 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:32,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 362 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2022-03-20 20:59:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2630. [2022-03-20 20:59:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 1836 states have (on average 1.2167755991285403) internal successors, (2234), 1862 states have internal predecessors, (2234), 587 states have call successors, (587), 207 states have call predecessors, (587), 206 states have return successors, (581), 560 states have call predecessors, (581), 581 states have call successors, (581) [2022-03-20 20:59:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 3402 transitions. [2022-03-20 20:59:33,247 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 3402 transitions. Word has length 110 [2022-03-20 20:59:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:33,247 INFO L478 AbstractCegarLoop]: Abstraction has 2630 states and 3402 transitions. [2022-03-20 20:59:33,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 3402 transitions. [2022-03-20 20:59:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 20:59:33,248 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:33,248 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:33,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:33,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-20 20:59:33,455 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:33,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:33,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1581009068, now seen corresponding path program 11 times [2022-03-20 20:59:33,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:33,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1650355812] [2022-03-20 20:59:33,456 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:33,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1581009068, now seen corresponding path program 12 times [2022-03-20 20:59:33,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:33,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551837041] [2022-03-20 20:59:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:33,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:33,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:33,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149858718] [2022-03-20 20:59:33,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:33,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:33,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:33,462 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:33,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 20:59:33,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 20:59:33,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 20:59:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 89 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 20:59:34,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:40,122 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:40,125 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 89 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 20:59:47,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:47,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551837041] [2022-03-20 20:59:47,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:47,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149858718] [2022-03-20 20:59:47,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149858718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:47,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:47,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 37 [2022-03-20 20:59:47,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:47,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1650355812] [2022-03-20 20:59:47,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1650355812] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:47,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:47,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 20:59:47,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981915220] [2022-03-20 20:59:47,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:47,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 20:59:47,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:47,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 20:59:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 20:59:47,195 INFO L87 Difference]: Start difference. First operand 2630 states and 3402 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 20:59:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:48,488 INFO L93 Difference]: Finished difference Result 2778 states and 3585 transitions. [2022-03-20 20:59:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 20:59:48,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 115 [2022-03-20 20:59:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:48,494 INFO L225 Difference]: With dead ends: 2778 [2022-03-20 20:59:48,494 INFO L226 Difference]: Without dead ends: 2771 [2022-03-20 20:59:48,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 20:59:48,495 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 98 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:48,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 937 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 20:59:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2022-03-20 20:59:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2709. [2022-03-20 20:59:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 1888 states have (on average 1.2139830508474576) internal successors, (2292), 1913 states have internal predecessors, (2292), 604 states have call successors, (604), 217 states have call predecessors, (604), 216 states have return successors, (598), 578 states have call predecessors, (598), 598 states have call successors, (598) [2022-03-20 20:59:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 3494 transitions. [2022-03-20 20:59:48,933 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 3494 transitions. Word has length 115 [2022-03-20 20:59:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:48,933 INFO L478 AbstractCegarLoop]: Abstraction has 2709 states and 3494 transitions. [2022-03-20 20:59:48,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 20:59:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 3494 transitions. [2022-03-20 20:59:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 20:59:48,934 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:48,934 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:48,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:49,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 20:59:49,139 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:49,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1307868536, now seen corresponding path program 13 times [2022-03-20 20:59:49,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:49,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068408460] [2022-03-20 20:59:49,140 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1307868536, now seen corresponding path program 14 times [2022-03-20 20:59:49,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:49,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026500046] [2022-03-20 20:59:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:49,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:49,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:49,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735041661] [2022-03-20 20:59:49,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:49,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:49,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:49,150 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:49,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 20:59:49,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:49,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:49,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-20 20:59:49,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:49,684 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 97 proven. 85 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-20 20:59:50,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 130 proven. 19 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 20:59:59,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:59,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026500046] [2022-03-20 20:59:59,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:59,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735041661] [2022-03-20 20:59:59,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735041661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:59,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:59,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 36 [2022-03-20 20:59:59,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:59,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068408460] [2022-03-20 20:59:59,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068408460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:59,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:59,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 20:59:59,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583312432] [2022-03-20 20:59:59,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:59,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 20:59:59,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:59,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 20:59:59,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 20:59:59,960 INFO L87 Difference]: Start difference. First operand 2709 states and 3494 transitions. Second operand has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 21:00:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:02,061 INFO L93 Difference]: Finished difference Result 2979 states and 3842 transitions. [2022-03-20 21:00:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 21:00:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 115 [2022-03-20 21:00:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:02,068 INFO L225 Difference]: With dead ends: 2979 [2022-03-20 21:00:02,068 INFO L226 Difference]: Without dead ends: 2976 [2022-03-20 21:00:02,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=303, Invalid=1677, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 21:00:02,069 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 133 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:02,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 828 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 21:00:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2022-03-20 21:00:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2912. [2022-03-20 21:00:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2020 states have (on average 1.2103960396039604) internal successors, (2445), 2046 states have internal predecessors, (2445), 654 states have call successors, (654), 238 states have call predecessors, (654), 237 states have return successors, (648), 627 states have call predecessors, (648), 648 states have call successors, (648) [2022-03-20 21:00:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 3747 transitions. [2022-03-20 21:00:02,566 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 3747 transitions. Word has length 115 [2022-03-20 21:00:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:02,566 INFO L478 AbstractCegarLoop]: Abstraction has 2912 states and 3747 transitions. [2022-03-20 21:00:02,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 21:00:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 3747 transitions. [2022-03-20 21:00:02,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 21:00:02,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:02,579 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:02,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:02,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 21:00:02,795 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash -349274797, now seen corresponding path program 3 times [2022-03-20 21:00:02,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429637513] [2022-03-20 21:00:02,796 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash -349274797, now seen corresponding path program 4 times [2022-03-20 21:00:02,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722997736] [2022-03-20 21:00:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:02,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:02,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:02,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875188977] [2022-03-20 21:00:02,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:00:02,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:02,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:02,802 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:02,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 21:00:02,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:00:02,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 21:00:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 262 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:00:03,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 70 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:00:03,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:03,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722997736] [2022-03-20 21:00:03,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:03,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875188977] [2022-03-20 21:00:03,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875188977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:03,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:03,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-20 21:00:03,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:03,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429637513] [2022-03-20 21:00:03,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429637513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:03,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:03,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:00:03,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091437754] [2022-03-20 21:00:03,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:03,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:00:03,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:03,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:00:03,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:00:03,415 INFO L87 Difference]: Start difference. First operand 2912 states and 3747 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:04,074 INFO L93 Difference]: Finished difference Result 2925 states and 3756 transitions. [2022-03-20 21:00:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:00:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2022-03-20 21:00:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:04,080 INFO L225 Difference]: With dead ends: 2925 [2022-03-20 21:00:04,081 INFO L226 Difference]: Without dead ends: 2918 [2022-03-20 21:00:04,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=628, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 21:00:04,081 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 227 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:04,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 382 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:00:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2022-03-20 21:00:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2912. [2022-03-20 21:00:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2020 states have (on average 1.2074257425742574) internal successors, (2439), 2046 states have internal predecessors, (2439), 654 states have call successors, (654), 238 states have call predecessors, (654), 237 states have return successors, (648), 627 states have call predecessors, (648), 648 states have call successors, (648) [2022-03-20 21:00:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 3741 transitions. [2022-03-20 21:00:04,571 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 3741 transitions. Word has length 121 [2022-03-20 21:00:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:04,571 INFO L478 AbstractCegarLoop]: Abstraction has 2912 states and 3741 transitions. [2022-03-20 21:00:04,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 3741 transitions. [2022-03-20 21:00:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 21:00:04,573 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:04,573 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:04,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:04,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:04,789 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:04,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2042365659, now seen corresponding path program 15 times [2022-03-20 21:00:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:04,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1208962172] [2022-03-20 21:00:04,790 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2042365659, now seen corresponding path program 16 times [2022-03-20 21:00:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:04,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390476634] [2022-03-20 21:00:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:04,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:04,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:04,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469632969] [2022-03-20 21:00:04,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:00:04,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:04,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:04,796 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:04,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 21:00:04,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:00:04,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:04,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-20 21:00:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:08,805 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 86 proven. 110 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 21:00:09,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:10,921 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:13,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390476634] [2022-03-20 21:00:13,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469632969] [2022-03-20 21:00:13,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469632969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:00:13,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:00:13,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 21:00:13,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1208962172] [2022-03-20 21:00:13,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1208962172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:13,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:13,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 21:00:13,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449920131] [2022-03-20 21:00:13,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:13,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 21:00:13,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:13,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 21:00:13,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:00:13,423 INFO L87 Difference]: Start difference. First operand 2912 states and 3741 transitions. Second operand has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-20 21:00:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:20,632 INFO L93 Difference]: Finished difference Result 3037 states and 3905 transitions. [2022-03-20 21:00:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 21:00:20,633 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 122 [2022-03-20 21:00:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:20,669 INFO L225 Difference]: With dead ends: 3037 [2022-03-20 21:00:20,670 INFO L226 Difference]: Without dead ends: 3034 [2022-03-20 21:00:20,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 21:00:20,671 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 155 mSDsluCounter, 1594 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:20,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1682 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 21:00:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2022-03-20 21:00:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2998. [2022-03-20 21:00:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2077 states have (on average 1.2103996148290803) internal successors, (2514), 2104 states have internal predecessors, (2514), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-20 21:00:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 3860 transitions. [2022-03-20 21:00:21,179 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 3860 transitions. Word has length 122 [2022-03-20 21:00:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:21,180 INFO L478 AbstractCegarLoop]: Abstraction has 2998 states and 3860 transitions. [2022-03-20 21:00:21,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-20 21:00:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 3860 transitions. [2022-03-20 21:00:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 21:00:21,182 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:21,182 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:21,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:21,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 21:00:21,395 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:21,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash -598915707, now seen corresponding path program 9 times [2022-03-20 21:00:21,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:21,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2041511796] [2022-03-20 21:00:21,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash -598915707, now seen corresponding path program 10 times [2022-03-20 21:00:21,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:21,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899863117] [2022-03-20 21:00:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:21,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:21,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:21,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313143700] [2022-03-20 21:00:21,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:00:21,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:21,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:21,402 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:21,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 21:00:21,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:00:21,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:21,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 21:00:21,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 279 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:00:21,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 87 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:00:21,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899863117] [2022-03-20 21:00:21,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:21,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313143700] [2022-03-20 21:00:21,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313143700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:21,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:21,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-20 21:00:21,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:21,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2041511796] [2022-03-20 21:00:21,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2041511796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:21,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:21,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:00:21,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50802880] [2022-03-20 21:00:21,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:21,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:00:21,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:21,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:00:21,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:00:21,985 INFO L87 Difference]: Start difference. First operand 2998 states and 3860 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:22,763 INFO L93 Difference]: Finished difference Result 3075 states and 3938 transitions. [2022-03-20 21:00:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:00:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 125 [2022-03-20 21:00:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:22,768 INFO L225 Difference]: With dead ends: 3075 [2022-03-20 21:00:22,768 INFO L226 Difference]: Without dead ends: 3068 [2022-03-20 21:00:22,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=449, Invalid=673, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:00:22,769 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 316 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:22,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 381 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:00:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2022-03-20 21:00:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 3004. [2022-03-20 21:00:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 2083 states have (on average 1.2097935669707154) internal successors, (2520), 2110 states have internal predecessors, (2520), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-20 21:00:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 3866 transitions. [2022-03-20 21:00:23,276 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 3866 transitions. Word has length 125 [2022-03-20 21:00:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:23,276 INFO L478 AbstractCegarLoop]: Abstraction has 3004 states and 3866 transitions. [2022-03-20 21:00:23,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 3866 transitions. [2022-03-20 21:00:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 21:00:23,279 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:23,279 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:23,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:23,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 21:00:23,495 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash -343429313, now seen corresponding path program 3 times [2022-03-20 21:00:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:23,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [392158146] [2022-03-20 21:00:23,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash -343429313, now seen corresponding path program 4 times [2022-03-20 21:00:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:23,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566897328] [2022-03-20 21:00:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:23,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:23,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135199103] [2022-03-20 21:00:23,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:00:23,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:23,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:23,508 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:23,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 21:00:23,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:00:23,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:23,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 21:00:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 275 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:00:23,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 83 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:00:24,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:24,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566897328] [2022-03-20 21:00:24,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:24,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135199103] [2022-03-20 21:00:24,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135199103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:24,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:24,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-20 21:00:24,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [392158146] [2022-03-20 21:00:24,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [392158146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:24,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:24,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:00:24,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814170341] [2022-03-20 21:00:24,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:24,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:00:24,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:24,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:00:24,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:00:24,084 INFO L87 Difference]: Start difference. First operand 3004 states and 3866 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:24,847 INFO L93 Difference]: Finished difference Result 3658 states and 4844 transitions. [2022-03-20 21:00:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:00:24,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 127 [2022-03-20 21:00:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:24,853 INFO L225 Difference]: With dead ends: 3658 [2022-03-20 21:00:24,853 INFO L226 Difference]: Without dead ends: 3089 [2022-03-20 21:00:24,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=447, Invalid=675, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:00:24,856 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 302 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:24,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 387 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:00:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2022-03-20 21:00:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 3069. [2022-03-20 21:00:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 2148 states have (on average 1.202513966480447) internal successors, (2583), 2175 states have internal predecessors, (2583), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-20 21:00:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 3929 transitions. [2022-03-20 21:00:25,390 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 3929 transitions. Word has length 127 [2022-03-20 21:00:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:25,390 INFO L478 AbstractCegarLoop]: Abstraction has 3069 states and 3929 transitions. [2022-03-20 21:00:25,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 3929 transitions. [2022-03-20 21:00:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 21:00:25,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:25,392 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:25,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:25,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 21:00:25,609 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash 410495670, now seen corresponding path program 17 times [2022-03-20 21:00:25,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:25,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823802420] [2022-03-20 21:00:25,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 410495670, now seen corresponding path program 18 times [2022-03-20 21:00:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:25,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560313294] [2022-03-20 21:00:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:25,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:25,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403976002] [2022-03-20 21:00:25,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:00:25,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:25,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:25,615 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:25,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 21:00:25,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:00:25,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:25,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 21:00:25,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 250 proven. 21 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-20 21:00:25,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 66 proven. 21 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 21:00:26,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:26,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560313294] [2022-03-20 21:00:26,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:26,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403976002] [2022-03-20 21:00:26,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403976002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:26,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:26,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 21:00:26,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:26,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823802420] [2022-03-20 21:00:26,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823802420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:26,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:26,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 21:00:26,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2722086] [2022-03-20 21:00:26,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:26,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 21:00:26,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:26,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 21:00:26,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 21:00:26,045 INFO L87 Difference]: Start difference. First operand 3069 states and 3929 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 21:00:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:26,922 INFO L93 Difference]: Finished difference Result 4973 states and 6641 transitions. [2022-03-20 21:00:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:00:26,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 131 [2022-03-20 21:00:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:26,930 INFO L225 Difference]: With dead ends: 4973 [2022-03-20 21:00:26,930 INFO L226 Difference]: Without dead ends: 3549 [2022-03-20 21:00:26,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:00:26,933 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 25 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:26,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 333 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:00:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2022-03-20 21:00:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3240. [2022-03-20 21:00:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 2249 states have (on average 1.2249888839484215) internal successors, (2755), 2282 states have internal predecessors, (2755), 770 states have call successors, (770), 222 states have call predecessors, (770), 220 states have return successors, (764), 735 states have call predecessors, (764), 764 states have call successors, (764) [2022-03-20 21:00:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 4289 transitions. [2022-03-20 21:00:27,582 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 4289 transitions. Word has length 131 [2022-03-20 21:00:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:27,582 INFO L478 AbstractCegarLoop]: Abstraction has 3240 states and 4289 transitions. [2022-03-20 21:00:27,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 21:00:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 4289 transitions. [2022-03-20 21:00:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 21:00:27,584 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:27,584 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:27,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:27,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-20 21:00:27,801 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash 419861042, now seen corresponding path program 19 times [2022-03-20 21:00:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:27,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1845527920] [2022-03-20 21:00:27,801 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash 419861042, now seen corresponding path program 20 times [2022-03-20 21:00:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:27,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393922259] [2022-03-20 21:00:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:27,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:27,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:27,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819712123] [2022-03-20 21:00:27,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:00:27,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:27,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:27,807 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:27,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 21:00:27,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:00:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:27,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 21:00:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 127 proven. 107 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-20 21:00:31,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:38,548 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:38,561 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:01:10,088 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (div (+ c_main_~b~0 (* (- 1) c_main_~c~0)) (- 4)))) (let ((.cse0 (div .cse3 c_main_~b~0))) (let ((.cse7 (* .cse0 4))) (let ((.cse4 (* c_main_~q~0 c_main_~x~0)) (.cse6 (+ .cse7 c_main_~k~0)) (.cse5 (* c_main_~s~0 c_main_~y~0)) (.cse1 (* c_main_~p~0 c_main_~x~0)) (.cse2 (* c_main_~r~0 c_main_~y~0))) (or (not (= (mod (+ (* 3 c_main_~c~0) c_main_~b~0) 4) 0)) (not (= (* .cse0 c_main_~b~0 2) (* 2 c_main_~v~0))) (<= c_main_~c~0 (* (* .cse0 c_main_~b~0) 4)) (not (= (+ .cse1 .cse2) c_main_~a~0)) (= c_main_~b~0 0) (not (= (mod .cse3 c_main_~b~0) 0)) (not (= c_main_~b~0 (+ .cse4 .cse5))) (not (= (+ (* .cse6 c_main_~b~0) (* (- 1) (* c_main_~b~0 .cse7)) c_main_~c~0) c_main_~a~0)) (= (+ (* .cse4 2) (* .cse6 c_main_~s~0 c_main_~y~0) (* .cse6 c_main_~q~0 c_main_~x~0) (* 2 .cse5)) (+ c_main_~b~0 .cse1 .cse2))))))) is different from true [2022-03-20 21:03:06,898 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (div (+ c_main_~b~0 (* (- 1) c_main_~c~0)) (- 4)))) (let ((.cse8 (div .cse3 c_main_~b~0))) (let ((.cse7 (* .cse8 4))) (let ((.cse0 (* .cse8 c_main_~b~0)) (.cse4 (* c_main_~q~0 c_main_~x~0)) (.cse6 (+ .cse7 c_main_~k~0)) (.cse5 (* c_main_~s~0 c_main_~y~0)) (.cse1 (* c_main_~p~0 c_main_~x~0)) (.cse2 (* c_main_~r~0 c_main_~y~0))) (or (not (= (mod (+ (* 3 c_main_~c~0) c_main_~b~0) 4) 0)) (not (= .cse0 c_main_~b~0)) (<= c_main_~c~0 (* .cse0 4)) (not (= (+ .cse1 .cse2) c_main_~a~0)) (= c_main_~b~0 0) (not (= (mod .cse3 c_main_~b~0) 0)) (not (= c_main_~b~0 (+ .cse4 .cse5))) (not (= (+ (* .cse6 c_main_~b~0) (* (- 1) (* c_main_~b~0 .cse7)) c_main_~c~0) c_main_~a~0)) (= (+ (* .cse4 2) (* .cse6 c_main_~s~0 c_main_~y~0) (* .cse6 c_main_~q~0 c_main_~x~0) (* 2 .cse5)) (+ c_main_~b~0 .cse1 .cse2))))))) is different from true [2022-03-20 21:03:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 137 proven. 86 refuted. 0 times theorem prover too weak. 334 trivial. 14 not checked. [2022-03-20 21:03:07,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:07,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393922259] [2022-03-20 21:03:07,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:07,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819712123] [2022-03-20 21:03:07,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819712123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:07,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:07,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2022-03-20 21:03:07,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:07,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1845527920] [2022-03-20 21:03:07,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1845527920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:07,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:07,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:03:07,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634136477] [2022-03-20 21:03:07,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:07,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:03:07,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:07,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:03:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1049, Unknown=3, NotChecked=138, Total=1406 [2022-03-20 21:03:07,495 INFO L87 Difference]: Start difference. First operand 3240 states and 4289 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:03:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:11,343 INFO L93 Difference]: Finished difference Result 3374 states and 4467 transitions. [2022-03-20 21:03:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:03:11,344 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 131 [2022-03-20 21:03:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:11,350 INFO L225 Difference]: With dead ends: 3374 [2022-03-20 21:03:11,350 INFO L226 Difference]: Without dead ends: 3369 [2022-03-20 21:03:11,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=278, Invalid=1449, Unknown=3, NotChecked=162, Total=1892 [2022-03-20 21:03:11,352 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 99 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:11,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1066 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 21:03:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2022-03-20 21:03:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3351. [2022-03-20 21:03:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 2316 states have (on average 1.2258203799654577) internal successors, (2839), 2350 states have internal predecessors, (2839), 803 states have call successors, (803), 232 states have call predecessors, (803), 231 states have return successors, (798), 768 states have call predecessors, (798), 798 states have call successors, (798) [2022-03-20 21:03:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4440 transitions. [2022-03-20 21:03:12,061 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4440 transitions. Word has length 131 [2022-03-20 21:03:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:12,061 INFO L478 AbstractCegarLoop]: Abstraction has 3351 states and 4440 transitions. [2022-03-20 21:03:12,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:03:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4440 transitions. [2022-03-20 21:03:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 21:03:12,063 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:12,063 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:03:12,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 21:03:12,269 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:12,270 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash 233578743, now seen corresponding path program 21 times [2022-03-20 21:03:12,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:12,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1982200328] [2022-03-20 21:03:12,270 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash 233578743, now seen corresponding path program 22 times [2022-03-20 21:03:12,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:12,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520600398] [2022-03-20 21:03:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:12,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:12,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:12,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503136479] [2022-03-20 21:03:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:03:12,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:12,277 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:03:12,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 21:03:12,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:03:12,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 21:03:12,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 103 proven. 134 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-20 21:03:13,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 117 proven. 90 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-03-20 21:03:16,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520600398] [2022-03-20 21:03:16,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503136479] [2022-03-20 21:03:16,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503136479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:16,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:16,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2022-03-20 21:03:16,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1982200328] [2022-03-20 21:03:16,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1982200328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:16,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:16,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:03:16,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393980546] [2022-03-20 21:03:16,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:16,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:03:16,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:03:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-20 21:03:16,114 INFO L87 Difference]: Start difference. First operand 3351 states and 4440 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:03:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:19,106 INFO L93 Difference]: Finished difference Result 3487 states and 4616 transitions. [2022-03-20 21:03:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:03:19,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 134 [2022-03-20 21:03:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:19,112 INFO L225 Difference]: With dead ends: 3487 [2022-03-20 21:03:19,112 INFO L226 Difference]: Without dead ends: 3484 [2022-03-20 21:03:19,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:03:19,113 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 102 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:19,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1218 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 21:03:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2022-03-20 21:03:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 3372. [2022-03-20 21:03:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 2333 states have (on average 1.2228889841405914) internal successors, (2853), 2369 states have internal predecessors, (2853), 800 states have call successors, (800), 239 states have call predecessors, (800), 238 states have return successors, (795), 763 states have call predecessors, (795), 795 states have call successors, (795) [2022-03-20 21:03:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 4448 transitions. [2022-03-20 21:03:19,779 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 4448 transitions. Word has length 134 [2022-03-20 21:03:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:19,779 INFO L478 AbstractCegarLoop]: Abstraction has 3372 states and 4448 transitions. [2022-03-20 21:03:19,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:03:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 4448 transitions. [2022-03-20 21:03:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 21:03:19,781 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:19,781 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:03:19,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 21:03:19,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-20 21:03:19,997 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1399729945, now seen corresponding path program 9 times [2022-03-20 21:03:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:19,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306378976] [2022-03-20 21:03:19,998 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1399729945, now seen corresponding path program 10 times [2022-03-20 21:03:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:19,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082457791] [2022-03-20 21:03:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:20,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:20,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129884826] [2022-03-20 21:03:20,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:03:20,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:20,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:20,004 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:03:20,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 21:03:20,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:03:20,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:20,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 21:03:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 35 proven. 294 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:03:20,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 35 proven. 102 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:03:20,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082457791] [2022-03-20 21:03:20,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129884826] [2022-03-20 21:03:20,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129884826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:20,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:20,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-20 21:03:20,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306378976] [2022-03-20 21:03:20,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306378976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:20,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:20,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:03:20,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311465487] [2022-03-20 21:03:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:20,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:03:20,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:03:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:03:20,594 INFO L87 Difference]: Start difference. First operand 3372 states and 4448 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:21,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:21,676 INFO L93 Difference]: Finished difference Result 4559 states and 6225 transitions. [2022-03-20 21:03:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 21:03:21,676 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 131 [2022-03-20 21:03:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:21,683 INFO L225 Difference]: With dead ends: 4559 [2022-03-20 21:03:21,684 INFO L226 Difference]: Without dead ends: 3862 [2022-03-20 21:03:21,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=468, Invalid=722, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:03:21,686 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 335 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:21,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 437 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:03:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2022-03-20 21:03:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3673. [2022-03-20 21:03:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 2456 states have (on average 1.22557003257329) internal successors, (3010), 2499 states have internal predecessors, (3010), 944 states have call successors, (944), 273 states have call predecessors, (944), 272 states have return successors, (938), 900 states have call predecessors, (938), 938 states have call successors, (938) [2022-03-20 21:03:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 4892 transitions. [2022-03-20 21:03:22,419 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 4892 transitions. Word has length 131 [2022-03-20 21:03:22,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:22,419 INFO L478 AbstractCegarLoop]: Abstraction has 3673 states and 4892 transitions. [2022-03-20 21:03:22,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 4892 transitions. [2022-03-20 21:03:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 21:03:22,421 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:22,421 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:03:22,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 21:03:22,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:22,631 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1440640833, now seen corresponding path program 1 times [2022-03-20 21:03:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:22,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1138923801] [2022-03-20 21:03:22,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1440640833, now seen corresponding path program 2 times [2022-03-20 21:03:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:22,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509640299] [2022-03-20 21:03:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:22,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:22,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:22,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419039663] [2022-03-20 21:03:22,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:03:22,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:22,652 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:03:22,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 21:03:22,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:03:22,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:22,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-20 21:03:22,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:26,206 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:26,209 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:26,211 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 105 proven. 141 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 21:03:26,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 145 proven. 21 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 21:03:27,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:27,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509640299] [2022-03-20 21:03:27,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:27,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419039663] [2022-03-20 21:03:27,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419039663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:27,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:27,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 30 [2022-03-20 21:03:27,418 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:27,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1138923801] [2022-03-20 21:03:27,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1138923801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:27,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:27,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:03:27,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740142640] [2022-03-20 21:03:27,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:27,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:03:27,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:03:27,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:03:27,419 INFO L87 Difference]: Start difference. First operand 3673 states and 4892 transitions. Second operand has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 21:03:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:30,901 INFO L93 Difference]: Finished difference Result 3906 states and 5212 transitions. [2022-03-20 21:03:30,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:03:30,902 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 132 [2022-03-20 21:03:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:30,909 INFO L225 Difference]: With dead ends: 3906 [2022-03-20 21:03:30,909 INFO L226 Difference]: Without dead ends: 3904 [2022-03-20 21:03:30,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 21:03:30,910 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 116 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:30,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1568 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 21:03:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2022-03-20 21:03:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 3758. [2022-03-20 21:03:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 2512 states have (on average 1.2261146496815287) internal successors, (3080), 2556 states have internal predecessors, (3080), 965 states have call successors, (965), 281 states have call predecessors, (965), 280 states have return successors, (959), 920 states have call predecessors, (959), 959 states have call successors, (959) [2022-03-20 21:03:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5004 transitions. [2022-03-20 21:03:31,710 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5004 transitions. Word has length 132 [2022-03-20 21:03:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:31,710 INFO L478 AbstractCegarLoop]: Abstraction has 3758 states and 5004 transitions. [2022-03-20 21:03:31,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 21:03:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5004 transitions. [2022-03-20 21:03:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 21:03:31,712 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:31,712 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:03:31,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 21:03:31,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:31,915 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:31,916 INFO L85 PathProgramCache]: Analyzing trace with hash 862891816, now seen corresponding path program 11 times [2022-03-20 21:03:31,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:31,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430821496] [2022-03-20 21:03:31,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:31,916 INFO L85 PathProgramCache]: Analyzing trace with hash 862891816, now seen corresponding path program 12 times [2022-03-20 21:03:31,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:31,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875803013] [2022-03-20 21:03:31,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:31,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:31,925 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:31,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950056252] [2022-03-20 21:03:31,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:03:31,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:31,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:31,927 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:03:31,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 21:03:32,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:03:32,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:32,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 21:03:32,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:03:32,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:03:32,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875803013] [2022-03-20 21:03:32,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950056252] [2022-03-20 21:03:32,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950056252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:32,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:32,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-20 21:03:32,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430821496] [2022-03-20 21:03:32,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430821496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:32,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:32,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:03:32,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216255034] [2022-03-20 21:03:32,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:32,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:03:32,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:32,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:03:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:03:32,598 INFO L87 Difference]: Start difference. First operand 3758 states and 5004 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:33,892 INFO L93 Difference]: Finished difference Result 4545 states and 6055 transitions. [2022-03-20 21:03:33,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 21:03:33,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 132 [2022-03-20 21:03:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:33,900 INFO L225 Difference]: With dead ends: 4545 [2022-03-20 21:03:33,900 INFO L226 Difference]: Without dead ends: 4538 [2022-03-20 21:03:33,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:03:33,901 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 342 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:33,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 460 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:03:33,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2022-03-20 21:03:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 4322. [2022-03-20 21:03:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 2865 states have (on average 1.2275741710296684) internal successors, (3517), 2953 states have internal predecessors, (3517), 1139 states have call successors, (1139), 318 states have call predecessors, (1139), 317 states have return successors, (1132), 1050 states have call predecessors, (1132), 1132 states have call successors, (1132) [2022-03-20 21:03:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5788 transitions. [2022-03-20 21:03:34,828 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5788 transitions. Word has length 132 [2022-03-20 21:03:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:34,828 INFO L478 AbstractCegarLoop]: Abstraction has 4322 states and 5788 transitions. [2022-03-20 21:03:34,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:34,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5788 transitions. [2022-03-20 21:03:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 21:03:34,830 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:34,830 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 21:03:34,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 21:03:35,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:35,043 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 68245470, now seen corresponding path program 3 times [2022-03-20 21:03:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:35,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [994950393] [2022-03-20 21:03:35,044 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 68245470, now seen corresponding path program 4 times [2022-03-20 21:03:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:35,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427908186] [2022-03-20 21:03:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:35,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:35,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:35,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302380390] [2022-03-20 21:03:35,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:03:35,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:35,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:35,050 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:03:35,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 21:03:35,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:03:35,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:35,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 21:03:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 49 proven. 286 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:03:35,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 49 proven. 94 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:03:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427908186] [2022-03-20 21:03:35,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302380390] [2022-03-20 21:03:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302380390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:35,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:35,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-20 21:03:35,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [994950393] [2022-03-20 21:03:35,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [994950393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:35,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:35,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:03:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457385423] [2022-03-20 21:03:35,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:35,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:03:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:03:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:03:35,715 INFO L87 Difference]: Start difference. First operand 4322 states and 5788 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:37,034 INFO L93 Difference]: Finished difference Result 5509 states and 7644 transitions. [2022-03-20 21:03:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 21:03:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 133 [2022-03-20 21:03:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:37,044 INFO L225 Difference]: With dead ends: 5509 [2022-03-20 21:03:37,044 INFO L226 Difference]: Without dead ends: 4328 [2022-03-20 21:03:37,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=467, Invalid=723, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:03:37,047 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 417 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:37,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 413 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:03:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2022-03-20 21:03:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4306. [2022-03-20 21:03:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 2852 states have (on average 1.2100280504908836) internal successors, (3451), 2939 states have internal predecessors, (3451), 1137 states have call successors, (1137), 317 states have call predecessors, (1137), 316 states have return successors, (1130), 1049 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-03-20 21:03:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 5718 transitions. [2022-03-20 21:03:38,054 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 5718 transitions. Word has length 133 [2022-03-20 21:03:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:38,055 INFO L478 AbstractCegarLoop]: Abstraction has 4306 states and 5718 transitions. [2022-03-20 21:03:38,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 5718 transitions. [2022-03-20 21:03:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:03:38,057 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:38,057 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:03:38,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 21:03:38,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:38,274 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:38,274 INFO L85 PathProgramCache]: Analyzing trace with hash -263391851, now seen corresponding path program 23 times [2022-03-20 21:03:38,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:38,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82305708] [2022-03-20 21:03:38,275 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash -263391851, now seen corresponding path program 24 times [2022-03-20 21:03:38,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:38,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597678150] [2022-03-20 21:03:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:38,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:38,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:38,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772600459] [2022-03-20 21:03:38,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:03:38,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:38,280 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:03:38,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 21:03:38,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 21:03:38,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:38,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 21:03:38,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 72 proven. 115 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 21:03:40,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:48,928 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 72 proven. 115 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 21:03:53,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:53,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597678150] [2022-03-20 21:03:53,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:53,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772600459] [2022-03-20 21:03:53,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772600459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:53,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:53,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2022-03-20 21:03:53,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:53,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82305708] [2022-03-20 21:03:53,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82305708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:53,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:53,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:03:53,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822445956] [2022-03-20 21:03:53,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:53,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:03:53,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:53,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:03:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:03:53,222 INFO L87 Difference]: Start difference. First operand 4306 states and 5718 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:03:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:56,212 INFO L93 Difference]: Finished difference Result 4466 states and 5936 transitions. [2022-03-20 21:03:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:03:56,213 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 138 [2022-03-20 21:03:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:56,222 INFO L225 Difference]: With dead ends: 4466 [2022-03-20 21:03:56,222 INFO L226 Difference]: Without dead ends: 4459 [2022-03-20 21:03:56,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 21:03:56,223 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 104 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:56,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1023 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 21:03:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4459 states. [2022-03-20 21:03:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4459 to 4306. [2022-03-20 21:03:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 2851 states have (on average 1.2101017186951946) internal successors, (3450), 2938 states have internal predecessors, (3450), 1137 states have call successors, (1137), 318 states have call predecessors, (1137), 317 states have return successors, (1130), 1049 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-03-20 21:03:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 5717 transitions. [2022-03-20 21:03:57,172 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 5717 transitions. Word has length 138 [2022-03-20 21:03:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:57,173 INFO L478 AbstractCegarLoop]: Abstraction has 4306 states and 5717 transitions. [2022-03-20 21:03:57,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:03:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 5717 transitions. [2022-03-20 21:03:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:03:57,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:57,175 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:03:57,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 21:03:57,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-20 21:03:57,378 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash -213306419, now seen corresponding path program 25 times [2022-03-20 21:03:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:57,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1384017040] [2022-03-20 21:03:57,379 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash -213306419, now seen corresponding path program 26 times [2022-03-20 21:03:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:57,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329997484] [2022-03-20 21:03:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:57,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:57,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:57,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694617620] [2022-03-20 21:03:57,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:03:57,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:57,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:57,385 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:03:57,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 21:03:57,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:03:57,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-20 21:03:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 125 proven. 158 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-20 21:03:58,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:04:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 181 proven. 33 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-03-20 21:04:05,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:04:05,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329997484] [2022-03-20 21:04:05,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:04:05,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694617620] [2022-03-20 21:04:05,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694617620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:04:05,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:04:05,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-20 21:04:05,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:04:05,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1384017040] [2022-03-20 21:04:05,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1384017040] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:04:05,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:04:05,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:04:05,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750274717] [2022-03-20 21:04:05,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:04:05,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:04:05,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:04:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:04:05,648 INFO L87 Difference]: Start difference. First operand 4306 states and 5717 transitions. Second operand has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 21:04:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:04:08,121 INFO L93 Difference]: Finished difference Result 4497 states and 5957 transitions. [2022-03-20 21:04:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 21:04:08,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 138 [2022-03-20 21:04:08,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:04:08,130 INFO L225 Difference]: With dead ends: 4497 [2022-03-20 21:04:08,130 INFO L226 Difference]: Without dead ends: 4494 [2022-03-20 21:04:08,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:04:08,131 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 101 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:04:08,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1290 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 21:04:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2022-03-20 21:04:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4378. [2022-03-20 21:04:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 2901 states have (on average 1.2071699413995174) internal successors, (3502), 2990 states have internal predecessors, (3502), 1147 states have call successors, (1147), 330 states have call predecessors, (1147), 329 states have return successors, (1140), 1057 states have call predecessors, (1140), 1140 states have call successors, (1140) [2022-03-20 21:04:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 5789 transitions. [2022-03-20 21:04:09,077 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 5789 transitions. Word has length 138 [2022-03-20 21:04:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:04:09,077 INFO L478 AbstractCegarLoop]: Abstraction has 4378 states and 5789 transitions. [2022-03-20 21:04:09,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 21:04:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 5789 transitions. [2022-03-20 21:04:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:04:09,081 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:04:09,081 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:04:09,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 21:04:09,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 21:04:09,297 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:04:09,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:04:09,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2103122581, now seen corresponding path program 27 times [2022-03-20 21:04:09,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:09,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [419160847] [2022-03-20 21:04:09,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:04:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2103122581, now seen corresponding path program 28 times [2022-03-20 21:04:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:04:09,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354116154] [2022-03-20 21:04:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:04:09,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:04:09,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:04:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895517639] [2022-03-20 21:04:09,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:04:09,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:04:09,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:04:09,306 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:04:09,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 21:04:09,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:04:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:04:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-20 21:04:09,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:04:10,070 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:04:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 158 proven. 128 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-20 21:04:13,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:04:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 188 proven. 19 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-03-20 21:04:21,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:04:21,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354116154] [2022-03-20 21:04:21,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:04:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895517639] [2022-03-20 21:04:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895517639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:04:21,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:04:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 38 [2022-03-20 21:04:21,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:04:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [419160847] [2022-03-20 21:04:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [419160847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:04:21,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:04:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 21:04:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975763003] [2022-03-20 21:04:21,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:04:21,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 21:04:21,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 21:04:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:04:21,957 INFO L87 Difference]: Start difference. First operand 4378 states and 5789 transitions. Second operand has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 21:04:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:04:28,308 INFO L93 Difference]: Finished difference Result 4640 states and 6130 transitions. [2022-03-20 21:04:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:04:28,309 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 138 [2022-03-20 21:04:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:04:28,316 INFO L225 Difference]: With dead ends: 4640 [2022-03-20 21:04:28,317 INFO L226 Difference]: Without dead ends: 4637 [2022-03-20 21:04:28,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 21:04:28,317 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 142 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:04:28,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1029 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 21:04:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2022-03-20 21:04:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 4511. [2022-03-20 21:04:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 2986 states have (on average 1.2069658405894172) internal successors, (3604), 3078 states have internal predecessors, (3604), 1180 states have call successors, (1180), 345 states have call predecessors, (1180), 344 states have return successors, (1173), 1087 states have call predecessors, (1173), 1173 states have call successors, (1173) [2022-03-20 21:04:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 5957 transitions. [2022-03-20 21:04:29,336 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 5957 transitions. Word has length 138 [2022-03-20 21:04:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:04:29,337 INFO L478 AbstractCegarLoop]: Abstraction has 4511 states and 5957 transitions. [2022-03-20 21:04:29,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 21:04:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 5957 transitions. [2022-03-20 21:04:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 21:04:29,339 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:04:29,339 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:04:29,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 21:04:29,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 21:04:29,555 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:04:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:04:29,555 INFO L85 PathProgramCache]: Analyzing trace with hash -734961387, now seen corresponding path program 9 times [2022-03-20 21:04:29,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:29,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1169650582] [2022-03-20 21:04:29,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:04:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash -734961387, now seen corresponding path program 10 times [2022-03-20 21:04:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:04:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591195459] [2022-03-20 21:04:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:04:29,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:04:29,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:04:29,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863081588] [2022-03-20 21:04:29,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:04:29,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:04:29,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:04:29,569 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:04:29,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 21:04:29,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:04:29,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:04:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-20 21:04:29,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:04:39,464 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:04:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 74 proven. 201 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-20 21:04:42,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:04:48,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:04:48,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591195459] [2022-03-20 21:04:48,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:04:48,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863081588] [2022-03-20 21:04:48,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863081588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:04:48,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:04:48,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 21:04:48,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:04:48,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1169650582] [2022-03-20 21:04:48,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1169650582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:04:48,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:04:48,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 21:04:48,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506372634] [2022-03-20 21:04:48,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:04:48,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 21:04:48,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:48,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 21:04:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:04:48,356 INFO L87 Difference]: Start difference. First operand 4511 states and 5957 transitions. Second operand has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 21:05:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:05:10,502 INFO L93 Difference]: Finished difference Result 4756 states and 6289 transitions. [2022-03-20 21:05:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:05:10,503 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 136 [2022-03-20 21:05:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:05:10,534 INFO L225 Difference]: With dead ends: 4756 [2022-03-20 21:05:10,534 INFO L226 Difference]: Without dead ends: 4754 [2022-03-20 21:05:10,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:05:10,535 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 150 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:05:10,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1401 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-03-20 21:05:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2022-03-20 21:05:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 4685. [2022-03-20 21:05:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 3098 states have (on average 1.21078114912847) internal successors, (3751), 3194 states have internal predecessors, (3751), 1229 states have call successors, (1229), 358 states have call predecessors, (1229), 357 states have return successors, (1222), 1132 states have call predecessors, (1222), 1222 states have call successors, (1222) [2022-03-20 21:05:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6202 transitions. [2022-03-20 21:05:11,615 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6202 transitions. Word has length 136 [2022-03-20 21:05:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:05:11,616 INFO L478 AbstractCegarLoop]: Abstraction has 4685 states and 6202 transitions. [2022-03-20 21:05:11,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 21:05:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6202 transitions. [2022-03-20 21:05:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 21:05:11,618 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:05:11,618 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:05:11,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 21:05:11,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:11,833 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:05:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:05:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1876530728, now seen corresponding path program 11 times [2022-03-20 21:05:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:11,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1553586436] [2022-03-20 21:05:11,834 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:05:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1876530728, now seen corresponding path program 12 times [2022-03-20 21:05:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:05:11,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626925167] [2022-03-20 21:05:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:05:11,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:05:11,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:05:11,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910896708] [2022-03-20 21:05:11,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:05:11,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:11,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:05:11,856 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:05:11,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 21:05:15,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 21:05:15,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:05:15,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 21:05:15,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:05:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 52 proven. 306 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:05:15,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:05:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 52 proven. 114 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:05:16,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:05:16,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626925167] [2022-03-20 21:05:16,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:05:16,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910896708] [2022-03-20 21:05:16,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910896708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:05:16,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:05:16,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-20 21:05:16,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:05:16,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1553586436] [2022-03-20 21:05:16,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1553586436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:05:16,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:05:16,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:05:16,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733477349] [2022-03-20 21:05:16,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:05:16,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:05:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:05:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:05:16,035 INFO L87 Difference]: Start difference. First operand 4685 states and 6202 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:05:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:05:17,503 INFO L93 Difference]: Finished difference Result 6236 states and 8592 transitions. [2022-03-20 21:05:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 21:05:17,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 137 [2022-03-20 21:05:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:05:17,513 INFO L225 Difference]: With dead ends: 6236 [2022-03-20 21:05:17,513 INFO L226 Difference]: Without dead ends: 4946 [2022-03-20 21:05:17,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=488, Invalid=772, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:05:17,516 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 334 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:05:17,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 455 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:05:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-03-20 21:05:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4849. [2022-03-20 21:05:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 3260 states have (on average 1.211042944785276) internal successors, (3948), 3313 states have internal predecessors, (3948), 1229 states have call successors, (1229), 360 states have call predecessors, (1229), 359 states have return successors, (1222), 1175 states have call predecessors, (1222), 1222 states have call successors, (1222) [2022-03-20 21:05:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 6399 transitions. [2022-03-20 21:05:18,633 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 6399 transitions. Word has length 137 [2022-03-20 21:05:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:05:18,634 INFO L478 AbstractCegarLoop]: Abstraction has 4849 states and 6399 transitions. [2022-03-20 21:05:18,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:05:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 6399 transitions. [2022-03-20 21:05:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:05:18,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:05:18,636 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:05:18,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 21:05:18,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:18,842 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:05:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:05:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash 414084436, now seen corresponding path program 11 times [2022-03-20 21:05:18,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:18,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [508480608] [2022-03-20 21:05:18,842 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:05:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash 414084436, now seen corresponding path program 12 times [2022-03-20 21:05:18,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:05:18,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038221148] [2022-03-20 21:05:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:05:18,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:05:18,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:05:18,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594106382] [2022-03-20 21:05:18,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:05:18,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:18,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:05:18,852 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:05:18,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 21:05:20,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 21:05:20,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:05:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 21:05:20,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:05:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 329 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:05:20,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:05:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 137 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:05:20,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:05:20,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038221148] [2022-03-20 21:05:20,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:05:20,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594106382] [2022-03-20 21:05:20,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594106382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:05:20,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:05:20,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-20 21:05:20,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:05:20,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [508480608] [2022-03-20 21:05:20,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [508480608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:05:20,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:05:20,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:05:20,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839343156] [2022-03-20 21:05:20,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:05:20,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:05:20,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:05:20,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:05:20,638 INFO L87 Difference]: Start difference. First operand 4849 states and 6399 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:05:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:05:22,366 INFO L93 Difference]: Finished difference Result 6374 states and 8659 transitions. [2022-03-20 21:05:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 21:05:22,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 138 [2022-03-20 21:05:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:05:22,376 INFO L225 Difference]: With dead ends: 6374 [2022-03-20 21:05:22,376 INFO L226 Difference]: Without dead ends: 5677 [2022-03-20 21:05:22,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=510, Invalid=822, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 21:05:22,378 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 355 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:05:22,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 485 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:05:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2022-03-20 21:05:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 5354. [2022-03-20 21:05:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 3516 states have (on average 1.2070534698521047) internal successors, (4244), 3577 states have internal predecessors, (4244), 1435 states have call successors, (1435), 403 states have call predecessors, (1435), 402 states have return successors, (1427), 1373 states have call predecessors, (1427), 1427 states have call successors, (1427) [2022-03-20 21:05:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 7106 transitions. [2022-03-20 21:05:23,671 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 7106 transitions. Word has length 138 [2022-03-20 21:05:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:05:23,671 INFO L478 AbstractCegarLoop]: Abstraction has 5354 states and 7106 transitions. [2022-03-20 21:05:23,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:05:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 7106 transitions. [2022-03-20 21:05:23,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 21:05:23,674 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:05:23,674 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:05:23,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 21:05:23,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:23,880 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:05:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:05:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash -392647317, now seen corresponding path program 29 times [2022-03-20 21:05:23,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [903819569] [2022-03-20 21:05:23,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:05:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash -392647317, now seen corresponding path program 30 times [2022-03-20 21:05:23,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:05:23,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208193859] [2022-03-20 21:05:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:05:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:05:23,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:05:23,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419093172] [2022-03-20 21:05:23,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:05:23,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:23,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:05:23,919 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:05:23,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 21:05:24,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:05:24,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:05:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 21:05:24,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:05:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 46 proven. 116 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-20 21:05:25,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:05:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 46 proven. 116 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-20 21:05:33,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:05:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208193859] [2022-03-20 21:05:33,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:05:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419093172] [2022-03-20 21:05:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419093172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:05:33,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:05:33,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 39 [2022-03-20 21:05:33,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:05:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [903819569] [2022-03-20 21:05:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [903819569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:05:33,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:05:33,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:05:33,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158307254] [2022-03-20 21:05:33,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:05:33,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:05:33,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:33,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:05:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 21:05:33,578 INFO L87 Difference]: Start difference. First operand 5354 states and 7106 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:05:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:05:36,097 INFO L93 Difference]: Finished difference Result 5542 states and 7333 transitions. [2022-03-20 21:05:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:05:36,098 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 142 [2022-03-20 21:05:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:05:36,108 INFO L225 Difference]: With dead ends: 5542 [2022-03-20 21:05:36,108 INFO L226 Difference]: Without dead ends: 5535 [2022-03-20 21:05:36,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 242 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 21:05:36,110 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 138 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:05:36,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 835 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 21:05:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2022-03-20 21:05:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 5392. [2022-03-20 21:05:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 3543 states have (on average 1.2054755856618684) internal successors, (4271), 3604 states have internal predecessors, (4271), 1437 states have call successors, (1437), 412 states have call predecessors, (1437), 411 states have return successors, (1429), 1375 states have call predecessors, (1429), 1429 states have call successors, (1429) [2022-03-20 21:05:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7137 transitions. [2022-03-20 21:05:37,474 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7137 transitions. Word has length 142 [2022-03-20 21:05:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:05:37,474 INFO L478 AbstractCegarLoop]: Abstraction has 5392 states and 7137 transitions. [2022-03-20 21:05:37,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:05:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7137 transitions. [2022-03-20 21:05:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 21:05:37,476 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:05:37,476 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:05:37,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 21:05:37,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-20 21:05:37,691 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:05:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:05:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1045312758, now seen corresponding path program 31 times [2022-03-20 21:05:37,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:37,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1488531005] [2022-03-20 21:05:37,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:05:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1045312758, now seen corresponding path program 32 times [2022-03-20 21:05:37,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:05:37,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683976760] [2022-03-20 21:05:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:05:37,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:05:37,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:05:37,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477689262] [2022-03-20 21:05:37,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:05:37,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:37,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:05:37,698 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:05:37,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 21:05:37,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:05:37,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:05:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 21:05:37,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:05:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 130 proven. 140 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-20 21:05:40,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:05:40,879 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:05:44,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:05:44,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683976760] [2022-03-20 21:05:44,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:05:44,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477689262] [2022-03-20 21:05:44,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477689262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:05:44,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:05:44,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 21:05:44,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:05:44,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1488531005] [2022-03-20 21:05:44,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1488531005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:05:44,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:05:44,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:05:44,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663159397] [2022-03-20 21:05:44,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:05:44,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:05:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:05:44,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-20 21:05:44,015 INFO L87 Difference]: Start difference. First operand 5392 states and 7137 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:05:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:05:49,331 INFO L93 Difference]: Finished difference Result 5585 states and 7396 transitions. [2022-03-20 21:05:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:05:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 145 [2022-03-20 21:05:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:05:49,344 INFO L225 Difference]: With dead ends: 5585 [2022-03-20 21:05:49,345 INFO L226 Difference]: Without dead ends: 5578 [2022-03-20 21:05:49,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:05:49,353 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 133 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:05:49,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 1537 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1611 Invalid, 0 Unknown, 20 Unchecked, 1.7s Time] [2022-03-20 21:05:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5578 states. [2022-03-20 21:05:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5578 to 5418. [2022-03-20 21:05:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 3563 states have (on average 1.2048835251192815) internal successors, (4293), 3621 states have internal predecessors, (4293), 1443 states have call successors, (1443), 416 states have call predecessors, (1443), 411 states have return successors, (1435), 1380 states have call predecessors, (1435), 1435 states have call successors, (1435) [2022-03-20 21:05:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 7171 transitions. [2022-03-20 21:05:50,759 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 7171 transitions. Word has length 145 [2022-03-20 21:05:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:05:50,759 INFO L478 AbstractCegarLoop]: Abstraction has 5418 states and 7171 transitions. [2022-03-20 21:05:50,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:05:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 7171 transitions. [2022-03-20 21:05:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 21:05:50,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:05:50,762 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:05:50,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 21:05:50,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:50,978 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:05:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:05:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1271116242, now seen corresponding path program 33 times [2022-03-20 21:05:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:50,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018470744] [2022-03-20 21:05:50,979 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:05:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1271116242, now seen corresponding path program 34 times [2022-03-20 21:05:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:05:50,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328292951] [2022-03-20 21:05:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:05:50,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:05:50,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:05:50,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117335925] [2022-03-20 21:05:50,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:05:50,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:05:50,992 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:05:50,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 21:05:51,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:05:51,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:05:51,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 21:05:51,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:05:51,791 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 140 proven. 103 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-20 21:06:00,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 198 proven. 19 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-03-20 21:06:06,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328292951] [2022-03-20 21:06:06,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117335925] [2022-03-20 21:06:06,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117335925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:06,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:06,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16] total 35 [2022-03-20 21:06:06,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018470744] [2022-03-20 21:06:06,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018470744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:06,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:06,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:06:06,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785305560] [2022-03-20 21:06:06,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:06,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:06:06,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:06:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:06:06,603 INFO L87 Difference]: Start difference. First operand 5418 states and 7171 transitions. Second operand has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:06:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:08,942 INFO L93 Difference]: Finished difference Result 5478 states and 7239 transitions. [2022-03-20 21:06:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:06:08,943 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 145 [2022-03-20 21:06:08,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:08,952 INFO L225 Difference]: With dead ends: 5478 [2022-03-20 21:06:08,952 INFO L226 Difference]: Without dead ends: 5471 [2022-03-20 21:06:08,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 21:06:08,953 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 104 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 800 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:08,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1613 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 633 Invalid, 0 Unknown, 800 Unchecked, 0.6s Time] [2022-03-20 21:06:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2022-03-20 21:06:10,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5418. [2022-03-20 21:06:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 3563 states have (on average 1.2048835251192815) internal successors, (4293), 3621 states have internal predecessors, (4293), 1443 states have call successors, (1443), 416 states have call predecessors, (1443), 411 states have return successors, (1435), 1380 states have call predecessors, (1435), 1435 states have call successors, (1435) [2022-03-20 21:06:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 7171 transitions. [2022-03-20 21:06:10,328 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 7171 transitions. Word has length 145 [2022-03-20 21:06:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:10,328 INFO L478 AbstractCegarLoop]: Abstraction has 5418 states and 7171 transitions. [2022-03-20 21:06:10,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:06:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 7171 transitions. [2022-03-20 21:06:10,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 21:06:10,330 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:10,330 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:10,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:10,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-20 21:06:10,535 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash 828416914, now seen corresponding path program 11 times [2022-03-20 21:06:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:10,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1827081549] [2022-03-20 21:06:10,536 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash 828416914, now seen corresponding path program 12 times [2022-03-20 21:06:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:10,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314247724] [2022-03-20 21:06:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:10,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:10,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:10,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8346853] [2022-03-20 21:06:10,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:10,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:10,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:10,543 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:06:10,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 21:06:10,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 21:06:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 21:06:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 166 proven. 50 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-03-20 21:06:11,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:13,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314247724] [2022-03-20 21:06:13,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8346853] [2022-03-20 21:06:13,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8346853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:06:13,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:06:13,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 21:06:13,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1827081549] [2022-03-20 21:06:13,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1827081549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:13,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:13,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 21:06:13,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741356202] [2022-03-20 21:06:13,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:13,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 21:06:13,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 21:06:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:06:13,150 INFO L87 Difference]: Start difference. First operand 5418 states and 7171 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 21:06:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:15,398 INFO L93 Difference]: Finished difference Result 6170 states and 8256 transitions. [2022-03-20 21:06:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:06:15,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 143 [2022-03-20 21:06:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:15,410 INFO L225 Difference]: With dead ends: 6170 [2022-03-20 21:06:15,410 INFO L226 Difference]: Without dead ends: 6168 [2022-03-20 21:06:15,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:06:15,413 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 155 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:15,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 388 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 21:06:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6168 states. [2022-03-20 21:06:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6168 to 6051. [2022-03-20 21:06:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6051 states, 4070 states have (on average 1.2331695331695331) internal successors, (5019), 4148 states have internal predecessors, (5019), 1560 states have call successors, (1560), 425 states have call predecessors, (1560), 420 states have return successors, (1552), 1477 states have call predecessors, (1552), 1552 states have call successors, (1552) [2022-03-20 21:06:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6051 states to 6051 states and 8131 transitions. [2022-03-20 21:06:16,921 INFO L78 Accepts]: Start accepts. Automaton has 6051 states and 8131 transitions. Word has length 143 [2022-03-20 21:06:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:16,921 INFO L478 AbstractCegarLoop]: Abstraction has 6051 states and 8131 transitions. [2022-03-20 21:06:16,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 21:06:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6051 states and 8131 transitions. [2022-03-20 21:06:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 21:06:16,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:16,924 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 8, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:16,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:17,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-20 21:06:17,140 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash -656443653, now seen corresponding path program 13 times [2022-03-20 21:06:17,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:17,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843724967] [2022-03-20 21:06:17,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash -656443653, now seen corresponding path program 14 times [2022-03-20 21:06:17,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:17,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804359192] [2022-03-20 21:06:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:17,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:17,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909292312] [2022-03-20 21:06:17,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:17,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:17,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:17,147 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:06:17,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 21:06:17,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:17,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:17,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 21:06:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:06:17,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 57 proven. 150 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:06:17,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:17,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804359192] [2022-03-20 21:06:17,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:17,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909292312] [2022-03-20 21:06:17,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909292312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:17,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:17,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-20 21:06:17,785 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:17,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843724967] [2022-03-20 21:06:17,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843724967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:17,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:17,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:06:17,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616750401] [2022-03-20 21:06:17,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:17,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:06:17,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:17,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:06:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:06:17,786 INFO L87 Difference]: Start difference. First operand 6051 states and 8131 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:06:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:20,127 INFO L93 Difference]: Finished difference Result 9027 states and 12642 transitions. [2022-03-20 21:06:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 21:06:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 144 [2022-03-20 21:06:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:20,141 INFO L225 Difference]: With dead ends: 9027 [2022-03-20 21:06:20,141 INFO L226 Difference]: Without dead ends: 7193 [2022-03-20 21:06:20,145 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=530, Invalid=876, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:06:20,146 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 418 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:20,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 496 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:06:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7193 states. [2022-03-20 21:06:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7193 to 7078. [2022-03-20 21:06:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 4784 states have (on average 1.223453177257525) internal successors, (5853), 4871 states have internal predecessors, (5853), 1826 states have call successors, (1826), 473 states have call predecessors, (1826), 467 states have return successors, (1817), 1733 states have call predecessors, (1817), 1817 states have call successors, (1817) [2022-03-20 21:06:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 9496 transitions. [2022-03-20 21:06:21,992 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 9496 transitions. Word has length 144 [2022-03-20 21:06:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:21,992 INFO L478 AbstractCegarLoop]: Abstraction has 7078 states and 9496 transitions. [2022-03-20 21:06:21,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:06:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 9496 transitions. [2022-03-20 21:06:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 21:06:21,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:21,994 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 21:06:22,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:22,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 21:06:22,207 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:22,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:22,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1774625240, now seen corresponding path program 35 times [2022-03-20 21:06:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:22,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1453651573] [2022-03-20 21:06:22,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1774625240, now seen corresponding path program 36 times [2022-03-20 21:06:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:22,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951343818] [2022-03-20 21:06:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:22,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:22,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:22,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310195327] [2022-03-20 21:06:22,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:22,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:22,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:22,213 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:06:22,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 21:06:22,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:06:22,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 21:06:22,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:39,109 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 46 proven. 142 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-20 21:06:39,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:43,448 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:43,542 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:44,358 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:44,476 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:44,603 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:44,701 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:45,037 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:45,712 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:45,909 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:46,084 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:46,316 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:46,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:46,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951343818] [2022-03-20 21:06:46,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:46,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310195327] [2022-03-20 21:06:46,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310195327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:06:46,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:06:46,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-20 21:06:46,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:46,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1453651573] [2022-03-20 21:06:46,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1453651573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:46,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:46,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:06:46,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209157205] [2022-03-20 21:06:46,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:46,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:06:46,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:06:46,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 21:06:46,454 INFO L87 Difference]: Start difference. First operand 7078 states and 9496 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:06:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:49,132 INFO L93 Difference]: Finished difference Result 7144 states and 9571 transitions. [2022-03-20 21:06:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:06:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 149 [2022-03-20 21:06:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:49,146 INFO L225 Difference]: With dead ends: 7144 [2022-03-20 21:06:49,147 INFO L226 Difference]: Without dead ends: 7137 [2022-03-20 21:06:49,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 21:06:49,149 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 90 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 535 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:49,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1456 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 392 Invalid, 0 Unknown, 535 Unchecked, 0.3s Time] [2022-03-20 21:06:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7137 states. [2022-03-20 21:06:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7137 to 7088. [2022-03-20 21:06:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7088 states, 4793 states have (on average 1.2230335906530356) internal successors, (5862), 4879 states have internal predecessors, (5862), 1827 states have call successors, (1827), 473 states have call predecessors, (1827), 467 states have return successors, (1818), 1735 states have call predecessors, (1818), 1818 states have call successors, (1818) [2022-03-20 21:06:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 9507 transitions. [2022-03-20 21:06:51,094 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 9507 transitions. Word has length 149 [2022-03-20 21:06:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:51,094 INFO L478 AbstractCegarLoop]: Abstraction has 7088 states and 9507 transitions. [2022-03-20 21:06:51,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:06:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 9507 transitions. [2022-03-20 21:06:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 21:06:51,097 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:51,097 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 21:06:51,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:51,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 21:06:51,311 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1181195580, now seen corresponding path program 37 times [2022-03-20 21:06:51,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:51,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [600203482] [2022-03-20 21:06:51,312 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1181195580, now seen corresponding path program 38 times [2022-03-20 21:06:51,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:51,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849698102] [2022-03-20 21:06:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:51,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783849765] [2022-03-20 21:06:51,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:51,318 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:06:51,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 21:06:51,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:51,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:51,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 21:06:51,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 97 proven. 190 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-20 21:06:52,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:56,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:56,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849698102] [2022-03-20 21:06:56,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:56,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783849765] [2022-03-20 21:06:56,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783849765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:06:56,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:06:56,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 21:06:56,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:56,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [600203482] [2022-03-20 21:06:56,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [600203482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:56,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:56,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:06:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389693960] [2022-03-20 21:06:56,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:56,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:06:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:06:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:06:56,608 INFO L87 Difference]: Start difference. First operand 7088 states and 9507 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:07:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:04,671 INFO L93 Difference]: Finished difference Result 7277 states and 9749 transitions. [2022-03-20 21:07:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 21:07:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 149 [2022-03-20 21:07:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:04,684 INFO L225 Difference]: With dead ends: 7277 [2022-03-20 21:07:04,685 INFO L226 Difference]: Without dead ends: 7274 [2022-03-20 21:07:04,687 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:07:04,687 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 129 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:04,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1621 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 21:07:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2022-03-20 21:07:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 7136. [2022-03-20 21:07:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 4825 states have (on average 1.2219689119170984) internal successors, (5896), 4911 states have internal predecessors, (5896), 1836 states have call successors, (1836), 480 states have call predecessors, (1836), 474 states have return successors, (1827), 1744 states have call predecessors, (1827), 1827 states have call successors, (1827) [2022-03-20 21:07:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 9559 transitions. [2022-03-20 21:07:06,558 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 9559 transitions. Word has length 149 [2022-03-20 21:07:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:06,558 INFO L478 AbstractCegarLoop]: Abstraction has 7136 states and 9559 transitions. [2022-03-20 21:07:06,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:07:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 9559 transitions. [2022-03-20 21:07:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 21:07:06,560 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:06,561 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:06,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:06,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:06,776 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash 205680083, now seen corresponding path program 39 times [2022-03-20 21:07:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:06,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942277471] [2022-03-20 21:07:06,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash 205680083, now seen corresponding path program 40 times [2022-03-20 21:07:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:06,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715979415] [2022-03-20 21:07:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:06,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:06,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419359800] [2022-03-20 21:07:06,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:06,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:06,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:06,782 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:06,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 21:07:06,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:06,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:06,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 21:07:06,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:09,768 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:10,544 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:18,500 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:18,504 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 210 proven. 108 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2022-03-20 21:07:23,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:44,130 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:08:43,528 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:08:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 210 proven. 105 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2022-03-20 21:08:48,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:48,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715979415] [2022-03-20 21:08:48,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:48,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419359800] [2022-03-20 21:08:48,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419359800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:48,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:48,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2022-03-20 21:08:48,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:48,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942277471] [2022-03-20 21:08:48,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942277471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:48,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:48,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:08:48,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530555976] [2022-03-20 21:08:48,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:48,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:08:48,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:08:48,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1399, Unknown=1, NotChecked=0, Total=1722 [2022-03-20 21:08:48,385 INFO L87 Difference]: Start difference. First operand 7136 states and 9559 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-20 21:08:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:54,431 INFO L93 Difference]: Finished difference Result 7156 states and 9579 transitions. [2022-03-20 21:08:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:08:54,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) Word has length 154 [2022-03-20 21:08:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:54,445 INFO L225 Difference]: With dead ends: 7156 [2022-03-20 21:08:54,445 INFO L226 Difference]: Without dead ends: 7149 [2022-03-20 21:08:54,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 265 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=403, Invalid=1852, Unknown=1, NotChecked=0, Total=2256 [2022-03-20 21:08:54,447 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 91 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:54,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 900 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 890 Invalid, 0 Unknown, 308 Unchecked, 1.0s Time] [2022-03-20 21:08:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7149 states. [2022-03-20 21:08:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7149 to 7140. [2022-03-20 21:08:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 4829 states have (on average 1.2217850486643198) internal successors, (5900), 4915 states have internal predecessors, (5900), 1836 states have call successors, (1836), 480 states have call predecessors, (1836), 474 states have return successors, (1827), 1744 states have call predecessors, (1827), 1827 states have call successors, (1827) [2022-03-20 21:08:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 9563 transitions. [2022-03-20 21:08:56,324 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 9563 transitions. Word has length 154 [2022-03-20 21:08:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:56,324 INFO L478 AbstractCegarLoop]: Abstraction has 7140 states and 9563 transitions. [2022-03-20 21:08:56,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-20 21:08:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 9563 transitions. [2022-03-20 21:08:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 21:08:56,327 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:56,327 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:56,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:56,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:56,530 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:56,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash 215045455, now seen corresponding path program 41 times [2022-03-20 21:08:56,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:56,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408753559] [2022-03-20 21:08:56,530 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash 215045455, now seen corresponding path program 42 times [2022-03-20 21:08:56,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:56,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372583593] [2022-03-20 21:08:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:56,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:56,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:56,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893931329] [2022-03-20 21:08:56,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:56,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:56,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:56,539 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:56,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 21:08:56,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 21:08:56,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:56,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 21:08:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:19,536 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:09:19,539 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:09:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 99 proven. 170 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-03-20 21:09:30,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:37,146 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:10:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 108 proven. 155 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-20 21:10:35,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:10:35,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372583593] [2022-03-20 21:10:35,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:10:35,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893931329] [2022-03-20 21:10:35,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893931329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:10:35,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:10:35,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2022-03-20 21:10:35,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:10:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408753559] [2022-03-20 21:10:35,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408753559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:10:35,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:10:35,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:10:35,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445969169] [2022-03-20 21:10:35,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:10:35,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:10:35,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:10:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:10:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=712, Unknown=4, NotChecked=0, Total=870 [2022-03-20 21:10:35,135 INFO L87 Difference]: Start difference. First operand 7140 states and 9563 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:10:37,658 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 [] [2022-03-20 21:10:39,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:10:52,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:10:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:10:59,123 INFO L93 Difference]: Finished difference Result 7769 states and 10409 transitions. [2022-03-20 21:10:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:10:59,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 154 [2022-03-20 21:10:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:10:59,138 INFO L225 Difference]: With dead ends: 7769 [2022-03-20 21:10:59,139 INFO L226 Difference]: Without dead ends: 7751 [2022-03-20 21:10:59,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=223, Invalid=1033, Unknown=4, NotChecked=0, Total=1260 [2022-03-20 21:10:59,141 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 66 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 36 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:10:59,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 859 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 784 Invalid, 3 Unknown, 0 Unchecked, 9.7s Time] [2022-03-20 21:10:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2022-03-20 21:11:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 7511. [2022-03-20 21:11:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7511 states, 5089 states have (on average 1.218707015130674) internal successors, (6202), 5174 states have internal predecessors, (6202), 1918 states have call successors, (1918), 509 states have call predecessors, (1918), 503 states have return successors, (1910), 1827 states have call predecessors, (1910), 1910 states have call successors, (1910) [2022-03-20 21:11:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7511 states to 7511 states and 10030 transitions. [2022-03-20 21:11:01,298 INFO L78 Accepts]: Start accepts. Automaton has 7511 states and 10030 transitions. Word has length 154 [2022-03-20 21:11:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:11:01,298 INFO L478 AbstractCegarLoop]: Abstraction has 7511 states and 10030 transitions. [2022-03-20 21:11:01,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:11:01,299 INFO L276 IsEmpty]: Start isEmpty. Operand 7511 states and 10030 transitions. [2022-03-20 21:11:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 21:11:01,301 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:11:01,301 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:11:01,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-20 21:11:01,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:11:01,515 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:11:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:11:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash 40584978, now seen corresponding path program 3 times [2022-03-20 21:11:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:11:01,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1697252760] [2022-03-20 21:11:01,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:11:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash 40584978, now seen corresponding path program 4 times [2022-03-20 21:11:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:11:01,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583217198] [2022-03-20 21:11:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:11:01,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:11:01,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:11:01,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655191431] [2022-03-20 21:11:01,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:11:01,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:11:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:11:01,523 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:11:01,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 21:11:01,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:11:01,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:11:01,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 21:11:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:11:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 93 proven. 20 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-03-20 21:11:01,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:11:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 93 proven. 20 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-03-20 21:11:02,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:11:02,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583217198] [2022-03-20 21:11:02,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:11:02,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655191431] [2022-03-20 21:11:02,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655191431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:11:02,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:11:02,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 21:11:02,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:11:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1697252760] [2022-03-20 21:11:02,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1697252760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:11:02,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:11:02,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 21:11:02,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127770342] [2022-03-20 21:11:02,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:11:02,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 21:11:02,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:11:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 21:11:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:11:02,687 INFO L87 Difference]: Start difference. First operand 7511 states and 10030 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 21:11:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:11:05,042 INFO L93 Difference]: Finished difference Result 7755 states and 10320 transitions. [2022-03-20 21:11:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:11:05,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 153 [2022-03-20 21:11:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:11:05,055 INFO L225 Difference]: With dead ends: 7755 [2022-03-20 21:11:05,055 INFO L226 Difference]: Without dead ends: 7753 [2022-03-20 21:11:05,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-20 21:11:05,056 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 32 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:11:05,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 349 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:11:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2022-03-20 21:11:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 7649. [2022-03-20 21:11:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7649 states, 5191 states have (on average 1.2194182238489695) internal successors, (6330), 5285 states have internal predecessors, (6330), 1940 states have call successors, (1940), 523 states have call predecessors, (1940), 517 states have return successors, (1932), 1840 states have call predecessors, (1932), 1932 states have call successors, (1932) [2022-03-20 21:11:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7649 states to 7649 states and 10202 transitions. [2022-03-20 21:11:07,261 INFO L78 Accepts]: Start accepts. Automaton has 7649 states and 10202 transitions. Word has length 153 [2022-03-20 21:11:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:11:07,261 INFO L478 AbstractCegarLoop]: Abstraction has 7649 states and 10202 transitions. [2022-03-20 21:11:07,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 21:11:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7649 states and 10202 transitions. [2022-03-20 21:11:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 21:11:07,264 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:11:07,264 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:11:07,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-20 21:11:07,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-20 21:11:07,477 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:11:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:11:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash 808456558, now seen corresponding path program 43 times [2022-03-20 21:11:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:11:07,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412534173] [2022-03-20 21:11:07,478 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:11:07,478 INFO L85 PathProgramCache]: Analyzing trace with hash 808456558, now seen corresponding path program 44 times [2022-03-20 21:11:07,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:11:07,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869761486] [2022-03-20 21:11:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:11:07,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:11:07,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:11:07,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949367360] [2022-03-20 21:11:07,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:11:07,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:11:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:11:07,486 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:11:07,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 21:11:07,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:11:07,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:11:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 21:11:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates...