/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/ps5-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 00:31:51,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 00:31:51,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 00:31:51,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 00:31:51,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-07 00:31:51,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-07 00:31:51,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-07 00:31:51,317 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-07 00:31:51,330 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 00:31:51,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 00:31:51,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 00:31:51,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 00:31:51,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 00:31:51,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 00:31:51,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 00:31:51,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 00:31:51,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 00:31:51,333 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 00:31:51,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 00:31:51,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 00:31:51,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 00:31:51,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-07 00:31:51,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 00:31:51,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:31:51,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 00:31:51,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-07 00:31:51,334 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-07 00:31:51,334 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-07 00:31:51,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 00:31:51,334 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-07 00:31:51,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 00:31:51,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 00:31:51,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 00:31:51,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 00:31:51,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 00:31:51,602 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 00:31:51,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound20.c [2022-04-07 00:31:51,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99354c50/ce045c3583714b49803f0bb1937b3bf3/FLAG6240da1f9 [2022-04-07 00:31:52,068 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 00:31:52,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound20.c [2022-04-07 00:31:52,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99354c50/ce045c3583714b49803f0bb1937b3bf3/FLAG6240da1f9 [2022-04-07 00:31:52,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99354c50/ce045c3583714b49803f0bb1937b3bf3 [2022-04-07 00:31:52,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 00:31:52,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 00:31:52,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 00:31:52,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 00:31:52,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 00:31:52,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67371bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52, skipping insertion in model container [2022-04-07 00:31:52,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 00:31:52,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 00:31:52,630 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/ps5-ll_valuebound20.c[458,471] [2022-04-07 00:31:52,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:31:52,650 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 00:31:52,660 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/ps5-ll_valuebound20.c[458,471] [2022-04-07 00:31:52,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:31:52,676 INFO L208 MainTranslator]: Completed translation [2022-04-07 00:31:52,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52 WrapperNode [2022-04-07 00:31:52,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 00:31:52,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 00:31:52,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 00:31:52,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 00:31:52,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 00:31:52,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 00:31:52,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 00:31:52,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 00:31:52,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52" (1/1) ... [2022-04-07 00:31:52,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:31:52,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:31:52,745 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) [2022-04-07 00:31:52,755 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 [2022-04-07 00:31:52,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 00:31:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 00:31:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 00:31:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-07 00:31:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-07 00:31:52,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 00:31:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 00:31:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 00:31:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 00:31:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 00:31:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-07 00:31:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-07 00:31:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-07 00:31:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 00:31:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 00:31:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 00:31:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 00:31:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 00:31:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 00:31:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 00:31:52,829 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 00:31:52,831 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 00:31:52,973 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 00:31:52,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 00:31:52,979 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 00:31:52,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:31:52 BoogieIcfgContainer [2022-04-07 00:31:52,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 00:31:52,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 00:31:52,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 00:31:52,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 00:31:52,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 12:31:52" (1/3) ... [2022-04-07 00:31:52,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8efb864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:31:52, skipping insertion in model container [2022-04-07 00:31:52,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:31:52" (2/3) ... [2022-04-07 00:31:52,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8efb864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:31:52, skipping insertion in model container [2022-04-07 00:31:52,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:31:52" (3/3) ... [2022-04-07 00:31:52,992 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound20.c [2022-04-07 00:31:53,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-07 00:31:53,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 00:31:53,044 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 00:31:53,057 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 [2022-04-07 00:31:53,058 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 00:31:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:31:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-07 00:31:53,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:31:53,095 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:31:53,096 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:31:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:31:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2022-04-07 00:31:53,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:31:53,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [288590472] [2022-04-07 00:31:53,122 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:31:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 2 times [2022-04-07 00:31:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:31:53,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294619024] [2022-04-07 00:31:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:31:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:31:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:31:53,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:31:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:31:53,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:31:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:31:53,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:31:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:31:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:31:53,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:31:53,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294619024] [2022-04-07 00:31:53,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294619024] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:31:53,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:31:53,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:31:53,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:31:53,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [288590472] [2022-04-07 00:31:53,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [288590472] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:31:53,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:31:53,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:31:53,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122723021] [2022-04-07 00:31:53,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:31:53,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-07 00:31:53,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:31:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-07 00:31:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 00:31:53,394 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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) [2022-04-07 00:31:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:31:53,449 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-04-07 00:31:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-07 00:31:53,458 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 [2022-04-07 00:31:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:31:53,464 INFO L225 Difference]: With dead ends: 51 [2022-04-07 00:31:53,464 INFO L226 Difference]: Without dead ends: 24 [2022-04-07 00:31:53,467 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 [2022-04-07 00:31:53,470 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:31:53,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:31:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-07 00:31:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-07 00:31:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:31:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-07 00:31:53,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-04-07 00:31:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:31:53,513 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-07 00:31:53,513 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) [2022-04-07 00:31:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-07 00:31:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-07 00:31:53,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:31:53,515 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:31:53,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 00:31:53,516 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:31:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:31:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2022-04-07 00:31:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:31:53,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1410826978] [2022-04-07 00:31:53,522 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:31:53,523 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 2 times [2022-04-07 00:31:53,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:31:53,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69695024] [2022-04-07 00:31:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:31:53,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:31:53,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:31:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710919639] [2022-04-07 00:31:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:31:53,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:31:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:31:53,546 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) [2022-04-07 00:31:53,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-07 00:31:53,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-07 00:31:53,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:31:53,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-07 00:31:53,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:31:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:31:53,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:31:53,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:31:53,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69695024] [2022-04-07 00:31:53,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:31:53,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710919639] [2022-04-07 00:31:53,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710919639] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:31:53,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:31:53,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:31:53,778 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:31:53,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1410826978] [2022-04-07 00:31:53,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1410826978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:31:53,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:31:53,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:31:53,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780404461] [2022-04-07 00:31:53,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:31:53,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:31:53,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:31:53,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:31:53,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:31:53,780 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-04-07 00:31:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:31:53,820 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-04-07 00:31:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:31:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 22 [2022-04-07 00:31:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:31:53,821 INFO L225 Difference]: With dead ends: 35 [2022-04-07 00:31:53,821 INFO L226 Difference]: Without dead ends: 31 [2022-04-07 00:31:53,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:31:53,823 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:31:53,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:31:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-07 00:31:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-07 00:31:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:31:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-04-07 00:31:53,832 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-04-07 00:31:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:31:53,832 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-04-07 00:31:53,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-04-07 00:31:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-04-07 00:31:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-07 00:31:53,833 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:31:53,833 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:31:53,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-07 00:31:54,055 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 [2022-04-07 00:31:54,056 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:31:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:31:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2022-04-07 00:31:54,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:31:54,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1136720855] [2022-04-07 00:31:54,058 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:31:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 2 times [2022-04-07 00:31:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:31:54,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914952605] [2022-04-07 00:31:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:31:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:31:54,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:31:54,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062341630] [2022-04-07 00:31:54,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:31:54,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:31:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:31:54,072 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) [2022-04-07 00:31:54,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-07 00:31:54,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:31:54,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:31:54,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-07 00:31:54,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:31:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:31:54,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:31:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:31:56,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:31:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914952605] [2022-04-07 00:31:56,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:31:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062341630] [2022-04-07 00:31:56,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062341630] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-07 00:31:56,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:31:56,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-07 00:31:56,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:31:56,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1136720855] [2022-04-07 00:31:56,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1136720855] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:31:56,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:31:56,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:31:56,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005937713] [2022-04-07 00:31:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:31:56,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:31:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:31:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:31:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2022-04-07 00:31:56,614 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:31:58,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:32:00,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:32:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:32:00,858 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-04-07 00:32:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:32:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-07 00:32:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:32:00,860 INFO L225 Difference]: With dead ends: 37 [2022-04-07 00:32:00,860 INFO L226 Difference]: Without dead ends: 33 [2022-04-07 00:32:00,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-04-07 00:32:00,862 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:32:00,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-04-07 00:32:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-07 00:32:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-07 00:32:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:32:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-07 00:32:00,878 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-04-07 00:32:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:32:00,878 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-07 00:32:00,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:32:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-07 00:32:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-07 00:32:00,880 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:32:00,880 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:32:00,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-07 00:32:01,087 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 [2022-04-07 00:32:01,088 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:32:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:32:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2022-04-07 00:32:01,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:01,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [295176011] [2022-04-07 00:32:01,089 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:32:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 2 times [2022-04-07 00:32:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:32:01,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510244516] [2022-04-07 00:32:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:32:01,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:32:01,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:32:01,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316786814] [2022-04-07 00:32:01,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:32:01,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:32:01,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:32:01,104 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) [2022-04-07 00:32:01,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-07 00:32:01,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:32:01,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:32:01,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-07 00:32:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:32:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-07 00:32:01,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:32:01,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:32:01,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510244516] [2022-04-07 00:32:01,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:32:01,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316786814] [2022-04-07 00:32:01,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316786814] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:32:01,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:32:01,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-07 00:32:01,654 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:32:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [295176011] [2022-04-07 00:32:01,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [295176011] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:32:01,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:32:01,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:32:01,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532037669] [2022-04-07 00:32:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:32:01,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:32:01,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:32:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:32:01,656 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:32:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:32:01,776 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-07 00:32:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-07 00:32:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-04-07 00:32:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:32:01,779 INFO L225 Difference]: With dead ends: 42 [2022-04-07 00:32:01,779 INFO L226 Difference]: Without dead ends: 36 [2022-04-07 00:32:01,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:32:01,780 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:32:01,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:32:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-07 00:32:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-07 00:32:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:32:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-04-07 00:32:01,799 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-04-07 00:32:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:32:01,799 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-04-07 00:32:01,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:32:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-07 00:32:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-07 00:32:01,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:32:01,802 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:32:01,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-07 00:32:02,015 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 [2022-04-07 00:32:02,016 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:32:02,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:32:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 3 times [2022-04-07 00:32:02,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:02,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1325921239] [2022-04-07 00:32:02,017 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:32:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 4 times [2022-04-07 00:32:02,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:32:02,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442307964] [2022-04-07 00:32:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:32:02,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:32:02,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:32:02,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283956165] [2022-04-07 00:32:02,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:32:02,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:32:02,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:32:02,032 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) [2022-04-07 00:32:02,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-07 00:32:02,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:32:02,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:32:02,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-07 00:32:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:32:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-07 00:32:02,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:32:02,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:32:02,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442307964] [2022-04-07 00:32:02,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:32:02,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283956165] [2022-04-07 00:32:02,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283956165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:32:02,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:32:02,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-07 00:32:02,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:32:02,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1325921239] [2022-04-07 00:32:02,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1325921239] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:32:02,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:32:02,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:32:02,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790926539] [2022-04-07 00:32:02,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:32:02,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:32:02,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:02,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:32:02,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:32:02,485 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-07 00:32:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:32:02,617 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-04-07 00:32:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:32:02,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-04-07 00:32:02,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:32:02,619 INFO L225 Difference]: With dead ends: 45 [2022-04-07 00:32:02,619 INFO L226 Difference]: Without dead ends: 39 [2022-04-07 00:32:02,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:32:02,620 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:32:02,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:32:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-07 00:32:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-07 00:32:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:32:02,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-04-07 00:32:02,638 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-04-07 00:32:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:32:02,638 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-04-07 00:32:02,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-07 00:32:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-04-07 00:32:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-07 00:32:02,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:32:02,641 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:32:02,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-07 00:32:02,865 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 [2022-04-07 00:32:02,866 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:32:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:32:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 5 times [2022-04-07 00:32:02,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:02,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1155899679] [2022-04-07 00:32:02,867 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:32:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 6 times [2022-04-07 00:32:02,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:32:02,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335615177] [2022-04-07 00:32:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:32:02,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:32:02,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:32:02,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855068652] [2022-04-07 00:32:02,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:32:02,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:32:02,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:32:02,888 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) [2022-04-07 00:32:02,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-07 00:32:03,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-07 00:32:03,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:32:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-07 00:32:03,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:32:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-07 00:32:03,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:32:03,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:32:03,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335615177] [2022-04-07 00:32:03,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:32:03,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855068652] [2022-04-07 00:32:03,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855068652] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:32:03,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:32:03,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-07 00:32:03,749 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:32:03,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1155899679] [2022-04-07 00:32:03,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1155899679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:32:03,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:32:03,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:32:03,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672608042] [2022-04-07 00:32:03,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:32:03,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:32:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:32:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:32:03,751 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-07 00:32:03,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:32:03,915 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-04-07 00:32:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:32:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-04-07 00:32:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:32:03,918 INFO L225 Difference]: With dead ends: 48 [2022-04-07 00:32:03,918 INFO L226 Difference]: Without dead ends: 42 [2022-04-07 00:32:03,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:32:03,919 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:32:03,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 199 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:32:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-07 00:32:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-07 00:32:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-07 00:32:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-07 00:32:03,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-04-07 00:32:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:32:03,930 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-07 00:32:03,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-07 00:32:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-07 00:32:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-07 00:32:03,931 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:32:03,931 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:32:03,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-07 00:32:04,142 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 [2022-04-07 00:32:04,142 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:32:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:32:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 7 times [2022-04-07 00:32:04,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:04,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1545446611] [2022-04-07 00:32:04,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:32:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 8 times [2022-04-07 00:32:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:32:04,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718559708] [2022-04-07 00:32:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:32:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:32:04,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:32:04,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529947402] [2022-04-07 00:32:04,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:32:04,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:32:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:32:04,176 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) [2022-04-07 00:32:04,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-07 00:32:05,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:32:05,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:32:05,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-07 00:32:05,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:32:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-07 00:32:05,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:32:05,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:32:05,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718559708] [2022-04-07 00:32:05,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:32:05,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529947402] [2022-04-07 00:32:05,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529947402] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:32:05,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:32:05,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-07 00:32:05,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:32:05,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1545446611] [2022-04-07 00:32:05,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1545446611] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:32:05,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:32:05,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:32:05,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481052320] [2022-04-07 00:32:05,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:32:05,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:32:05,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:05,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:32:05,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:32:05,447 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-07 00:32:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:32:05,649 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-04-07 00:32:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:32:05,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-04-07 00:32:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:32:05,651 INFO L225 Difference]: With dead ends: 51 [2022-04-07 00:32:05,651 INFO L226 Difference]: Without dead ends: 45 [2022-04-07 00:32:05,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:32:05,652 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:32:05,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 234 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:32:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-07 00:32:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-07 00:32:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-07 00:32:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-07 00:32:05,662 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-04-07 00:32:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:32:05,663 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-07 00:32:05,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-07 00:32:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-07 00:32:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-07 00:32:05,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:32:05,664 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:32:05,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-07 00:32:05,870 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 [2022-04-07 00:32:05,871 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:32:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:32:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 9 times [2022-04-07 00:32:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:05,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [222684831] [2022-04-07 00:32:05,872 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:32:05,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 10 times [2022-04-07 00:32:05,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:32:05,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859152597] [2022-04-07 00:32:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:32:05,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:32:05,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:32:05,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564167475] [2022-04-07 00:32:05,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:32:05,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:32:05,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:32:05,889 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) [2022-04-07 00:32:05,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-07 00:32:05,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:32:05,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:32:05,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-07 00:32:05,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:32:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-07 00:32:06,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:32:06,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:32:06,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859152597] [2022-04-07 00:32:06,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:32:06,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564167475] [2022-04-07 00:32:06,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564167475] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:32:06,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:32:06,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-07 00:32:06,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:32:06,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [222684831] [2022-04-07 00:32:06,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [222684831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:32:06,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:32:06,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:32:06,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765148192] [2022-04-07 00:32:06,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:32:06,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:32:06,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:06,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:32:06,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:32:06,394 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-07 00:32:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:32:06,603 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-04-07 00:32:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:32:06,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-04-07 00:32:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:32:06,604 INFO L225 Difference]: With dead ends: 54 [2022-04-07 00:32:06,604 INFO L226 Difference]: Without dead ends: 48 [2022-04-07 00:32:06,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:32:06,605 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:32:06,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 271 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:32:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-07 00:32:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-07 00:32:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-07 00:32:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-04-07 00:32:06,616 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-04-07 00:32:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:32:06,616 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-04-07 00:32:06,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-07 00:32:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-04-07 00:32:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-07 00:32:06,617 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:32:06,618 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:32:06,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-07 00:32:06,831 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 [2022-04-07 00:32:06,832 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:32:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:32:06,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 11 times [2022-04-07 00:32:06,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:06,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [561874497] [2022-04-07 00:32:06,833 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:32:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 12 times [2022-04-07 00:32:06,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:32:06,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550166348] [2022-04-07 00:32:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:32:06,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:32:06,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:32:06,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272940186] [2022-04-07 00:32:06,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:32:06,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:32:06,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:32:06,843 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) [2022-04-07 00:32:06,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-07 00:32:19,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-07 00:32:19,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:32:19,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-07 00:32:19,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:32:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-07 00:32:19,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:32:19,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:32:19,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550166348] [2022-04-07 00:32:19,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:32:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272940186] [2022-04-07 00:32:19,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272940186] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:32:19,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:32:19,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-07 00:32:19,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:32:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [561874497] [2022-04-07 00:32:19,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [561874497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:32:19,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:32:19,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:32:19,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905556481] [2022-04-07 00:32:19,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:32:19,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:32:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:32:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:32:19,903 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-07 00:32:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:32:20,169 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-07 00:32:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:32:20,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-04-07 00:32:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:32:20,172 INFO L225 Difference]: With dead ends: 57 [2022-04-07 00:32:20,172 INFO L226 Difference]: Without dead ends: 51 [2022-04-07 00:32:20,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:32:20,174 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:32:20,174 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 310 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:32:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-07 00:32:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-07 00:32:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-07 00:32:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-04-07 00:32:20,184 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-04-07 00:32:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:32:20,184 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-04-07 00:32:20,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-07 00:32:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-04-07 00:32:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-07 00:32:20,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:32:20,186 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:32:20,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-07 00:32:20,395 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 [2022-04-07 00:32:20,396 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:32:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:32:20,396 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 13 times [2022-04-07 00:32:20,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:20,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [276337388] [2022-04-07 00:32:20,397 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:32:20,397 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 14 times [2022-04-07 00:32:20,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:32:20,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295269981] [2022-04-07 00:32:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:32:20,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:32:20,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:32:20,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943742820] [2022-04-07 00:32:20,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:32:20,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:32:20,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:32:20,414 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) [2022-04-07 00:32:20,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-07 00:32:28,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:32:28,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:32:28,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-07 00:32:28,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:32:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-07 00:32:28,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:32:28,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:32:28,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295269981] [2022-04-07 00:32:28,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:32:28,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943742820] [2022-04-07 00:32:28,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943742820] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:32:28,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:32:28,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-07 00:32:28,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:32:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [276337388] [2022-04-07 00:32:28,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [276337388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:32:28,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:32:28,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:32:28,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509302180] [2022-04-07 00:32:28,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:32:28,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:32:28,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:28,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:32:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:32:28,796 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-04-07 00:32:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:32:29,091 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-04-07 00:32:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:32:29,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-04-07 00:32:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:32:29,092 INFO L225 Difference]: With dead ends: 60 [2022-04-07 00:32:29,092 INFO L226 Difference]: Without dead ends: 54 [2022-04-07 00:32:29,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:32:29,093 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:32:29,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 351 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:32:29,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-07 00:32:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-07 00:32:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-07 00:32:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-04-07 00:32:29,104 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-04-07 00:32:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:32:29,105 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-04-07 00:32:29,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-04-07 00:32:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-04-07 00:32:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-07 00:32:29,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:32:29,106 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:32:29,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-07 00:32:29,306 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 [2022-04-07 00:32:29,307 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:32:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:32:29,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 15 times [2022-04-07 00:32:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:29,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1764124596] [2022-04-07 00:32:29,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:32:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 16 times [2022-04-07 00:32:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:32:29,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669036478] [2022-04-07 00:32:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:32:29,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:32:29,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:32:29,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743650414] [2022-04-07 00:32:29,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:32:29,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:32:29,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:32:29,320 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) [2022-04-07 00:32:29,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-07 00:32:29,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:32:29,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:32:29,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-07 00:32:29,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:32:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-07 00:32:29,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:32:29,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:32:29,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669036478] [2022-04-07 00:32:29,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:32:29,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743650414] [2022-04-07 00:32:29,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743650414] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:32:29,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:32:29,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-07 00:32:29,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:32:29,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1764124596] [2022-04-07 00:32:29,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1764124596] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:32:29,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:32:29,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:32:29,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680228806] [2022-04-07 00:32:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:32:29,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:32:29,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:29,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:32:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:32:29,935 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-04-07 00:32:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:32:30,257 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-04-07 00:32:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:32:30,258 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-04-07 00:32:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:32:30,259 INFO L225 Difference]: With dead ends: 63 [2022-04-07 00:32:30,259 INFO L226 Difference]: Without dead ends: 57 [2022-04-07 00:32:30,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:32:30,260 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:32:30,260 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 394 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:32:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-07 00:32:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-07 00:32:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-07 00:32:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-04-07 00:32:30,270 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-04-07 00:32:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:32:30,270 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-04-07 00:32:30,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-04-07 00:32:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-04-07 00:32:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-07 00:32:30,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:32:30,272 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:32:30,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-07 00:32:30,487 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 [2022-04-07 00:32:30,487 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:32:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:32:30,488 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 17 times [2022-04-07 00:32:30,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:32:30,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013634366] [2022-04-07 00:32:30,489 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:32:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 18 times [2022-04-07 00:32:30,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:32:30,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352969371] [2022-04-07 00:32:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:32:30,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:32:30,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:32:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199073689] [2022-04-07 00:32:30,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:32:30,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:32:30,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:32:30,503 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) [2022-04-07 00:32:30,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-07 00:35:38,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-07 00:35:38,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:35:38,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-07 00:35:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:35:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 22 proven. 135 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-07 00:35:38,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:35:38,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:35:38,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352969371] [2022-04-07 00:35:38,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:35:38,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199073689] [2022-04-07 00:35:38,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199073689] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:35:38,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:35:38,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-07 00:35:38,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:35:38,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013634366] [2022-04-07 00:35:38,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013634366] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:35:38,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:35:38,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:35:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821245113] [2022-04-07 00:35:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:35:38,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:35:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:35:38,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:35:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:35:38,872 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-04-07 00:35:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:35:39,220 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-04-07 00:35:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:35:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 96 [2022-04-07 00:35:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:35:39,221 INFO L225 Difference]: With dead ends: 66 [2022-04-07 00:35:39,221 INFO L226 Difference]: Without dead ends: 60 [2022-04-07 00:35:39,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:35:39,222 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:35:39,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 439 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:35:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-07 00:35:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-07 00:35:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-07 00:35:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-04-07 00:35:39,233 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 96 [2022-04-07 00:35:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:35:39,233 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-04-07 00:35:39,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-04-07 00:35:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-04-07 00:35:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-07 00:35:39,234 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:35:39,234 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:35:39,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-07 00:35:39,443 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 [2022-04-07 00:35:39,443 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:35:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:35:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1610181715, now seen corresponding path program 19 times [2022-04-07 00:35:39,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:35:39,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1127392896] [2022-04-07 00:35:39,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:35:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1610181715, now seen corresponding path program 20 times [2022-04-07 00:35:39,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:35:39,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604103045] [2022-04-07 00:35:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:35:39,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:35:39,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:35:39,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368010401] [2022-04-07 00:35:39,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:35:39,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:35:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:35:39,455 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) [2022-04-07 00:35:39,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-07 00:38:41,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:38:41,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:38:41,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-07 00:38:41,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:38:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-07 00:38:41,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:38:42,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:38:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604103045] [2022-04-07 00:38:42,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:38:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368010401] [2022-04-07 00:38:42,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368010401] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:38:42,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:38:42,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-07 00:38:42,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:38:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1127392896] [2022-04-07 00:38:42,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1127392896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:38:42,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:38:42,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:38:42,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121524222] [2022-04-07 00:38:42,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:38:42,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:38:42,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:38:42,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:38:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-04-07 00:38:42,482 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-04-07 00:38:42,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:38:42,865 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-04-07 00:38:42,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:38:42,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 103 [2022-04-07 00:38:42,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:38:42,866 INFO L225 Difference]: With dead ends: 69 [2022-04-07 00:38:42,866 INFO L226 Difference]: Without dead ends: 63 [2022-04-07 00:38:42,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-04-07 00:38:42,867 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 2 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:38:42,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 468 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:38:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-07 00:38:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-04-07 00:38:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-07 00:38:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-04-07 00:38:42,879 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 103 [2022-04-07 00:38:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:38:42,879 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-04-07 00:38:42,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-04-07 00:38:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-04-07 00:38:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-07 00:38:42,880 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:38:42,880 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:38:42,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-07 00:38:43,081 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 [2022-04-07 00:38:43,081 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:38:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:38:43,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1881400669, now seen corresponding path program 21 times [2022-04-07 00:38:43,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:38:43,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [255623594] [2022-04-07 00:38:43,082 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:38:43,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1881400669, now seen corresponding path program 22 times [2022-04-07 00:38:43,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:38:43,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652240391] [2022-04-07 00:38:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:38:43,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:38:43,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:38:43,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622723133] [2022-04-07 00:38:43,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:38:43,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:38:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:38:43,097 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) [2022-04-07 00:38:43,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-07 00:38:43,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:38:43,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:38:43,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-07 00:38:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:38:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 26 proven. 198 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-07 00:38:43,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:38:43,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:38:43,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652240391] [2022-04-07 00:38:43,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:38:43,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622723133] [2022-04-07 00:38:43,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622723133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:38:43,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:38:43,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-07 00:38:43,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:38:43,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [255623594] [2022-04-07 00:38:43,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [255623594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:38:43,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:38:43,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-07 00:38:43,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229582974] [2022-04-07 00:38:43,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:38:43,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-07 00:38:43,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:38:43,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-07 00:38:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:38:43,720 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-04-07 00:38:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:38:44,188 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-04-07 00:38:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-07 00:38:44,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 110 [2022-04-07 00:38:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:38:44,190 INFO L225 Difference]: With dead ends: 72 [2022-04-07 00:38:44,190 INFO L226 Difference]: Without dead ends: 66 [2022-04-07 00:38:44,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:38:44,191 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:38:44,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 535 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-07 00:38:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-07 00:38:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-04-07 00:38:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-07 00:38:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-04-07 00:38:44,202 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 110 [2022-04-07 00:38:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:38:44,202 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-04-07 00:38:44,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-04-07 00:38:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-04-07 00:38:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-07 00:38:44,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:38:44,204 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:38:44,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-07 00:38:44,429 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 [2022-04-07 00:38:44,429 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:38:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:38:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1600671149, now seen corresponding path program 23 times [2022-04-07 00:38:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:38:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [687408415] [2022-04-07 00:38:44,430 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:38:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1600671149, now seen corresponding path program 24 times [2022-04-07 00:38:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:38:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163063809] [2022-04-07 00:38:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:38:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:38:44,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:38:44,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437975920] [2022-04-07 00:38:44,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:38:44,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:38:44,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:38:44,440 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) [2022-04-07 00:38:44,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process