/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:08:15,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:08:15,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:08:15,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:08:15,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:08:15,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:08:15,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:08:15,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:08:15,930 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:08:15,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:08:15,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:08:15,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:08:15,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:08:15,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:08:15,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:08:15,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:08:15,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:08:15,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:08:15,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:08:15,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:08:15,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:08:15,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:08:15,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:08:15,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:08:15,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:08:15,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:08:15,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:08:15,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:08:15,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:08:15,934 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:08:15,934 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:08:15,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:08:15,934 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:08:15,934 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:08:16,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:08:16,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:08:16,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:08:16,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:08:16,092 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:08:16,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-03-20 14:08:16,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702fb8cf1/efad2a605f2847f395a8ba95c8bdcd11/FLAGa6e115ca2 [2022-03-20 14:08:16,491 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:08:16,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-03-20 14:08:16,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702fb8cf1/efad2a605f2847f395a8ba95c8bdcd11/FLAGa6e115ca2 [2022-03-20 14:08:16,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702fb8cf1/efad2a605f2847f395a8ba95c8bdcd11 [2022-03-20 14:08:16,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:08:16,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:08:16,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:08:16,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:08:16,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:08:16,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543b9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16, skipping insertion in model container [2022-03-20 14:08:16,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:08:16,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:08:16,674 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/cohencu-ll_valuebound20.c[588,601] [2022-03-20 14:08:16,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:08:16,703 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:08:16,712 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/cohencu-ll_valuebound20.c[588,601] [2022-03-20 14:08:16,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:08:16,743 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:08:16,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16 WrapperNode [2022-03-20 14:08:16,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:08:16,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:08:16,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:08:16,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:08:16,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:08:16,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:08:16,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:08:16,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:08:16,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16" (1/1) ... [2022-03-20 14:08:16,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:08:16,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:08:16,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 14:08:16,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 14:08:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:08:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:08:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:08:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:08:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:08:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:08:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:08:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:08:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:08:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:08:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-20 14:08:16,840 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:08:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:08:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:08:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:08:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:08:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:08:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:08:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:08:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:08:16,885 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:08:16,886 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:08:16,971 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:08:16,991 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:08:16,991 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 14:08:16,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:08:16 BoogieIcfgContainer [2022-03-20 14:08:16,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:08:16,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:08:16,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:08:16,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:08:16,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:08:16" (1/3) ... [2022-03-20 14:08:16,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94413b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:08:16, skipping insertion in model container [2022-03-20 14:08:16,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:08:16" (2/3) ... [2022-03-20 14:08:16,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94413b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:08:16, skipping insertion in model container [2022-03-20 14:08:16,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:08:16" (3/3) ... [2022-03-20 14:08:16,998 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.c [2022-03-20 14:08:17,001 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:08:17,001 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:08:17,035 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:08:17,042 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 14:08:17,042 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:08:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 14:08:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 14:08:17,057 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:08:17,057 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:08:17,058 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:08:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:08:17,061 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2022-03-20 14:08:17,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:17,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831864991] [2022-03-20 14:08:17,073 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:08:17,073 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 2 times [2022-03-20 14:08:17,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:08:17,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924170505] [2022-03-20 14:08:17,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:08:17,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:08:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:08:17,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:08:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:08:17,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:08:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:08:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:08:17,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:08:17,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924170505] [2022-03-20 14:08:17,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924170505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:17,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:17,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:08:17,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:08:17,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831864991] [2022-03-20 14:08:17,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831864991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:17,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:17,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:08:17,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086298950] [2022-03-20 14:08:17,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:08:17,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:08:17,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:17,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:08:17,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:08:17,272 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 14:08:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:08:17,375 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-03-20 14:08:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:08:17,376 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 14:08:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:08:17,382 INFO L225 Difference]: With dead ends: 63 [2022-03-20 14:08:17,382 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 14:08:17,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:08:17,388 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:08:17,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:08:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 14:08:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 14:08:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:08:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-03-20 14:08:17,427 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-03-20 14:08:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:08:17,428 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-03-20 14:08:17,428 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 14:08:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-03-20 14:08:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 14:08:17,429 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:08:17,429 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:08:17,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:08:17,430 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:08:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:08:17,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2022-03-20 14:08:17,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:17,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712266934] [2022-03-20 14:08:17,438 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:08:17,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 2 times [2022-03-20 14:08:17,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:08:17,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377872106] [2022-03-20 14:08:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:08:17,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:08:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:08:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:08:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:08:17,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:08:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:08:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:08:17,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:08:17,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377872106] [2022-03-20 14:08:17,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377872106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:17,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:17,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:08:17,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:08:17,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712266934] [2022-03-20 14:08:17,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712266934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:17,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:17,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:08:17,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912846776] [2022-03-20 14:08:17,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:08:17,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:08:17,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:08:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:08:17,590 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 14:08:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:08:17,746 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-03-20 14:08:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:08:17,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 14:08:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:08:17,747 INFO L225 Difference]: With dead ends: 37 [2022-03-20 14:08:17,747 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 14:08:17,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:08:17,748 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:08:17,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:08:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 14:08:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 14:08:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:08:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 14:08:17,756 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-03-20 14:08:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:08:17,756 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 14:08:17,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 14:08:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 14:08:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 14:08:17,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:08:17,757 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:08:17,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 14:08:17,758 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:08:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:08:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2022-03-20 14:08:17,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:17,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1125263713] [2022-03-20 14:08:17,759 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:08:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 2 times [2022-03-20 14:08:17,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:08:17,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461016298] [2022-03-20 14:08:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:08:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:08:17,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:08:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979667604] [2022-03-20 14:08:17,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:08:17,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:08:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:08:17,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:08:17,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 14:08:17,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:08:17,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:08:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:08:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:08:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:08:17,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:08:17,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:08:17,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461016298] [2022-03-20 14:08:17,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:08:17,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979667604] [2022-03-20 14:08:17,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979667604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:17,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:17,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:08:17,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:08:17,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1125263713] [2022-03-20 14:08:17,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1125263713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:17,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:17,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:08:17,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095497554] [2022-03-20 14:08:17,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:08:17,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:08:17,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:17,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:08:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:08:17,876 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:08:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:08:17,908 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-03-20 14:08:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:08:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 14:08:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:08:17,910 INFO L225 Difference]: With dead ends: 54 [2022-03-20 14:08:17,910 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 14:08:17,910 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 [2022-03-20 14:08:17,911 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:08:17,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 168 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:08:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 14:08:17,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-03-20 14:08:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 14:08:17,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-03-20 14:08:17,919 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-03-20 14:08:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:08:17,919 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-03-20 14:08:17,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:08:17,920 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-03-20 14:08:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 14:08:17,920 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:08:17,920 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:08:17,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 14:08:18,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:08:18,153 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:08:18,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:08:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2022-03-20 14:08:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:18,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [654679950] [2022-03-20 14:08:18,154 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:08:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 2 times [2022-03-20 14:08:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:08:18,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244169202] [2022-03-20 14:08:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:08:18,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:08:18,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:08:18,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645938456] [2022-03-20 14:08:18,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:08:18,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:08:18,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:08:18,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:08:18,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 14:08:18,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:08:18,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:08:18,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:08:18,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:08:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:08:18,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:08:18,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:08:18,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244169202] [2022-03-20 14:08:18,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:08:18,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645938456] [2022-03-20 14:08:18,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645938456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:18,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:18,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:08:18,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:08:18,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [654679950] [2022-03-20 14:08:18,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [654679950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:18,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:18,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:08:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039456516] [2022-03-20 14:08:18,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:08:18,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:08:18,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:08:18,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:08:18,296 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-03-20 14:08:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:08:18,345 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-03-20 14:08:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:08:18,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 27 [2022-03-20 14:08:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:08:18,348 INFO L225 Difference]: With dead ends: 58 [2022-03-20 14:08:18,348 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 14:08:18,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:08:18,349 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:08:18,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:08:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 14:08:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-20 14:08:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 14:08:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-03-20 14:08:18,363 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-03-20 14:08:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:08:18,363 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-03-20 14:08:18,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-03-20 14:08:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-03-20 14:08:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 14:08:18,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:08:18,364 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:08:18,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 14:08:18,585 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,SelfDestructingSolverStorable3 [2022-03-20 14:08:18,585 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:08:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:08:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2022-03-20 14:08:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:18,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [27661299] [2022-03-20 14:08:18,587 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:08:18,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 2 times [2022-03-20 14:08:18,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:08:18,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931472549] [2022-03-20 14:08:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:08:18,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:08:18,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:08:18,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066483230] [2022-03-20 14:08:18,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:08:18,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:08:18,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:08:18,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:08:18,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 14:08:18,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:08:18,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:08:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:08:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:08:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:08:18,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:08:18,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:08:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931472549] [2022-03-20 14:08:18,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:08:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066483230] [2022-03-20 14:08:18,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066483230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:18,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:18,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:08:18,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:08:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [27661299] [2022-03-20 14:08:18,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [27661299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:18,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:18,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:08:18,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878375624] [2022-03-20 14:08:18,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:08:18,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:08:18,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:18,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:08:18,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:08:18,726 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:08:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:08:18,785 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-03-20 14:08:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:08:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 14:08:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:08:18,786 INFO L225 Difference]: With dead ends: 66 [2022-03-20 14:08:18,786 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 14:08:18,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:08:18,787 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:08:18,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:08:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 14:08:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 14:08:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:08:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-20 14:08:18,794 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-03-20 14:08:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:08:18,794 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-20 14:08:18,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:08:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-20 14:08:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 14:08:18,795 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:08:18,795 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:08:18,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 14:08:19,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:08:19,012 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:08:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:08:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2022-03-20 14:08:19,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:19,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234770359] [2022-03-20 14:10:52,464 WARN L232 SmtUtils]: Spent 2.55m on a formula simplification. DAG size of input: 192 DAG size of output: 187 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:10:52,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:10:52,473 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:10:52,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1018400594, now seen corresponding path program 1 times [2022-03-20 14:10:52,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:10:52,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472600801] [2022-03-20 14:10:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:10:52,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:10:52,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:10:52,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488785038] [2022-03-20 14:10:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:10:52,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:10:52,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:10:52,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:10:52,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 14:10:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:10:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 14:10:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:10:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:10:59,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:11:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:11:56,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:56,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472600801] [2022-03-20 14:11:56,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:56,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488785038] [2022-03-20 14:11:56,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488785038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:11:56,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:11:56,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 14:13:40,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:13:40,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234770359] [2022-03-20 14:13:40,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234770359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:13:40,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:13:40,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 14:13:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757658049] [2022-03-20 14:13:40,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:13:40,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 14:13:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:13:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 14:13:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=971, Unknown=33, NotChecked=0, Total=1190 [2022-03-20 14:13:40,355 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 14:13:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:13:59,030 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-03-20 14:13:59,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 14:13:59,031 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 49 [2022-03-20 14:13:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:13:59,032 INFO L225 Difference]: With dead ends: 74 [2022-03-20 14:13:59,032 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 14:13:59,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 121.6s TimeCoverageRelationStatistics Valid=228, Invalid=1219, Unknown=35, NotChecked=0, Total=1482 [2022-03-20 14:13:59,034 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:13:59,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 391 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2022-03-20 14:13:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 14:13:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-03-20 14:13:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:13:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-03-20 14:13:59,048 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 49 [2022-03-20 14:13:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:13:59,048 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-03-20 14:13:59,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 14:13:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-03-20 14:13:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 14:13:59,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:13:59,049 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:13:59,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 14:13:59,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:13:59,261 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:13:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:13:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 2 times [2022-03-20 14:13:59,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:13:59,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [979858500] [2022-03-20 14:16:08,313 WARN L232 SmtUtils]: Spent 2.15m on a formula simplification. DAG size of input: 192 DAG size of output: 190 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:16:08,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:16:08,317 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:16:08,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1063970467, now seen corresponding path program 1 times [2022-03-20 14:16:08,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:16:08,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121371108] [2022-03-20 14:16:08,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:16:08,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:16:08,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:16:08,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269093947] [2022-03-20 14:16:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:16:08,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:16:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:16:08,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:16:08,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 14:16:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 14:16:08,505 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 14:16:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 14:16:08,731 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 14:16:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 3 times [2022-03-20 14:16:08,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:16:08,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081603268] [2022-03-20 14:16:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:16:08,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:16:08,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:16:08,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570644573] [2022-03-20 14:16:08,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 14:16:08,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:16:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:16:08,739 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:16:08,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 14:16:08,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 14:16:08,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:16:08,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 14:16:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:16:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 14:16:09,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:16:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 14:16:09,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:16:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081603268] [2022-03-20 14:16:09,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:16:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570644573] [2022-03-20 14:16:09,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570644573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:16:09,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:16:09,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 14:16:09,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:16:09,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [979858500] [2022-03-20 14:16:09,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [979858500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:16:09,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:16:09,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:16:09,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341493391] [2022-03-20 14:16:09,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:16:09,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:16:09,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:16:09,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:16:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:16:09,999 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:16:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:16:10,580 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-20 14:16:10,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:16:10,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-03-20 14:16:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:16:10,581 INFO L225 Difference]: With dead ends: 91 [2022-03-20 14:16:10,581 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 14:16:10,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:16:10,582 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:16:10,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 238 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:16:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 14:16:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-03-20 14:16:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 22 states have call successors, (22), 14 states have call predecessors, (22), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 14:16:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-03-20 14:16:10,602 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 54 [2022-03-20 14:16:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:16:10,602 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-03-20 14:16:10,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:16:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-03-20 14:16:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:16:10,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:16:10,607 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:16:10,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 14:16:10,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 14:16:11,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:16:11,007 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:16:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:16:11,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1546120389, now seen corresponding path program 4 times [2022-03-20 14:16:11,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:16:11,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [799898756] [2022-03-20 14:17:21,871 WARN L232 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 192 DAG size of output: 188 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:17:21,874 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:17:21,874 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:17:21,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1624834318, now seen corresponding path program 1 times [2022-03-20 14:17:21,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:17:21,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163796193] [2022-03-20 14:17:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:17:21,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:17:21,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:17:21,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998195326] [2022-03-20 14:17:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:17:21,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:17:21,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:17:21,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:17:21,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 14:17:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:17:22,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 14:17:22,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:18:24,407 WARN L232 SmtUtils]: Spent 14.11s on a formula simplification. DAG size of input: 135 DAG size of output: 130 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:18:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:18:27,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:18:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:18:37,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:18:37,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163796193] [2022-03-20 14:18:37,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:18:37,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998195326] [2022-03-20 14:18:37,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998195326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:18:37,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:18:37,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 14:20:30,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:20:30,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [799898756] [2022-03-20 14:20:30,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [799898756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:20:30,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:20:30,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 14:20:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454945111] [2022-03-20 14:20:30,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:20:30,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 14:20:30,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:20:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 14:20:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1100, Unknown=32, NotChecked=0, Total=1332 [2022-03-20 14:20:30,012 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 18 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-20 14:20:35,851 WARN L833 $PredicateComparison]: unable to prove that (and (= (* c_main_~n~0 c_main_~n~0 c_main_~n~0) c_main_~x~0) (or (let ((.cse0 (div (+ (- 12) c_main_~z~0) 12))) (and (= (mod c_main_~z~0 12) 0) (<= 0 .cse0) (exists ((aux_div_aux_mod_main_~n~0_37_28 Int)) (let ((.cse4 (div (+ (- 12) c_main_~z~0) 12))) (let ((.cse1 (* 6 .cse4)) (.cse3 (* (* .cse4 .cse4 .cse4) 8)) (.cse2 (* .cse4 .cse4))) (and (= (+ .cse1 (* .cse2 16) (* 8 (* aux_div_aux_mod_main_~n~0_37_28 aux_div_aux_mod_main_~n~0_37_28 aux_div_aux_mod_main_~n~0_37_28)) .cse3 (* (* aux_div_aux_mod_main_~n~0_37_28 aux_div_aux_mod_main_~n~0_37_28 .cse4) 24) (* aux_div_aux_mod_main_~n~0_37_28 6) (* (* aux_div_aux_mod_main_~n~0_37_28 .cse4) 32) 1 (* 16 (* aux_div_aux_mod_main_~n~0_37_28 aux_div_aux_mod_main_~n~0_37_28)) (* (* aux_div_aux_mod_main_~n~0_37_28 .cse4 .cse4) 24)) c_main_~x~0) (< (* aux_div_aux_mod_main_~n~0_37_28 2) 2) (= (+ .cse1 .cse3 (* .cse2 12) 1) c_main_~x~0))))) (= (+ 7 (* 18 .cse0) (* (* .cse0 .cse0) 12)) c_main_~y~0))) (and (= c_main_~x~0 0) (= 6 c_main_~z~0) (= c_main_~y~0 1)) (let ((.cse5 (div (+ 6 (* (- 1) c_main_~z~0)) 12))) (and (< .cse5 0) (exists ((aux_mod_aux_mod_aux_mod_main_~a~0_41_91_63 Int) (aux_div_aux_mod_aux_mod_main_~a~0_41_91_63 Int) (aux_div_aux_mod_main_~a~0_41_91 Int)) (let ((.cse6 (* 65536 aux_div_aux_mod_main_~a~0_41_91)) (.cse7 (* 65536 aux_div_aux_mod_aux_mod_main_~a~0_41_91_63))) (and (<= 0 aux_mod_aux_mod_aux_mod_main_~a~0_41_91_63) (forall ((v_itHalf_3 Int)) (or (not (<= (+ v_itHalf_3 (div (+ 6 (* (- 1) c_main_~z~0)) 12) 1) 0)) (and (<= (+ aux_mod_aux_mod_aux_mod_main_~a~0_41_91_63 (* 65536 aux_div_aux_mod_main_~a~0_41_91) (* 65536 aux_div_aux_mod_aux_mod_main_~a~0_41_91_63) (* v_itHalf_3 2)) 32766) (= 0 (* 72 (* v_itHalf_3 v_itHalf_3)))) (not (<= 0 v_itHalf_3)))) (< 0 (+ 32769 aux_mod_aux_mod_aux_mod_main_~a~0_41_91_63 .cse6 .cse7)) (<= 0 aux_div_aux_mod_aux_mod_main_~a~0_41_91_63) (<= (+ aux_mod_aux_mod_aux_mod_main_~a~0_41_91_63 .cse7) 32767) (<= (+ aux_mod_aux_mod_aux_mod_main_~a~0_41_91_63 .cse6 .cse7) 32767)))) (= (+ (* (* .cse5 .cse5 .cse5) 8) c_main_~x~0) 0) (= (mod (+ 6 (* 11 c_main_~z~0)) 12) 0) (exists ((aux_div_aux_mod_main_~n~0_31_67 Int)) (let ((.cse8 (+ (* 2 (div (+ 6 (* (- 1) c_main_~z~0)) 12)) (* aux_div_aux_mod_main_~n~0_31_67 2)))) (and (< .cse8 2) (= (+ (* aux_div_aux_mod_main_~n~0_31_67 6) (* (* aux_div_aux_mod_main_~n~0_31_67 aux_div_aux_mod_main_~n~0_31_67) 12) 1) c_main_~y~0) (<= 0 .cse8)))))))) is different from false [2022-03-20 14:20:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:20:50,768 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-03-20 14:20:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 14:20:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 18 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 59 [2022-03-20 14:20:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:20:50,771 INFO L225 Difference]: With dead ends: 90 [2022-03-20 14:20:50,771 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 14:20:50,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 157.8s TimeCoverageRelationStatistics Valid=256, Invalid=1436, Unknown=34, NotChecked=80, Total=1806 [2022-03-20 14:20:50,772 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:20:50,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 363 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 70 Invalid, 0 Unknown, 152 Unchecked, 0.6s Time] [2022-03-20 14:20:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 14:20:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 14:20:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 22 states have call successors, (22), 16 states have call predecessors, (22), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 14:20:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-03-20 14:20:50,798 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 59 [2022-03-20 14:20:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:20:50,798 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-03-20 14:20:50,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 18 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-20 14:20:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-03-20 14:20:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 14:20:50,799 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:20:50,799 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:20:50,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 14:20:51,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:20:51,007 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:20:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:20:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash -389057674, now seen corresponding path program 5 times [2022-03-20 14:20:51,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:20:51,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [385390595] [2022-03-20 14:22:22,829 WARN L232 SmtUtils]: Spent 1.53m on a formula simplification. DAG size of input: 195 DAG size of output: 190 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:22:22,833 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:22:22,834 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:22:22,834 INFO L85 PathProgramCache]: Analyzing trace with hash 746353091, now seen corresponding path program 1 times [2022-03-20 14:22:22,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:22:22,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397866407] [2022-03-20 14:22:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:22:22,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:22:22,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:22:22,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956843119] [2022-03-20 14:22:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:22:22,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:22:22,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:22:22,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:22:22,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 14:22:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:22:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 14:22:23,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:22:51,881 WARN L232 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 87 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)