/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 03:40:46,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 03:40:46,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 03:40:47,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 03:40:47,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 03:40:47,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 03:40:47,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 03:40:47,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 03:40:47,049 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 03:40:47,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 03:40:47,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 03:40:47,050 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 03:40:47,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 03:40:47,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 03:40:47,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 03:40:47,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 03:40:47,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 03:40:47,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 03:40:47,051 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 03:40:47,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 03:40:47,051 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 03:40:47,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 03:40:47,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 03:40:47,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 03:40:47,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 03:40:47,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 03:40:47,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:40:47,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 03:40:47,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 03:40:47,052 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 03:40:47,052 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 03:40:47,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 03:40:47,052 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 03:40:47,053 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 03:40:47,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 03:40:47,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 03:40:47,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 03:40:47,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 03:40:47,269 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 03:40:47,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound5.c [2022-03-19 03:40:47,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f85a3ff1/b10152da10314ce1933eb1ac42cda467/FLAGd8023160e [2022-03-19 03:40:47,690 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 03:40:47,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound5.c [2022-03-19 03:40:47,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f85a3ff1/b10152da10314ce1933eb1ac42cda467/FLAGd8023160e [2022-03-19 03:40:47,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f85a3ff1/b10152da10314ce1933eb1ac42cda467 [2022-03-19 03:40:47,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 03:40:47,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 03:40:47,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 03:40:47,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 03:40:47,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 03:40:47,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1acbda8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47, skipping insertion in model container [2022-03-19 03:40:47,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 03:40:47,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 03:40:47,868 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_valuebound5.c[588,601] [2022-03-19 03:40:47,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:40:47,888 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 03:40:47,898 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound5.c[588,601] [2022-03-19 03:40:47,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:40:47,914 INFO L208 MainTranslator]: Completed translation [2022-03-19 03:40:47,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47 WrapperNode [2022-03-19 03:40:47,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 03:40:47,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 03:40:47,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 03:40:47,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 03:40:47,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 03:40:47,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 03:40:47,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 03:40:47,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 03:40:47,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47" (1/1) ... [2022-03-19 03:40:47,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:40:47,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:40:47,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 03:40:47,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 03:40:48,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 03:40:48,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 03:40:48,004 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 03:40:48,004 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 03:40:48,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 03:40:48,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 03:40:48,004 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 03:40:48,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 03:40:48,005 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 03:40:48,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 03:40:48,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-19 03:40:48,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 03:40:48,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 03:40:48,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 03:40:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 03:40:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 03:40:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 03:40:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 03:40:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 03:40:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 03:40:48,047 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 03:40:48,048 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 03:40:48,125 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 03:40:48,129 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 03:40:48,129 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 03:40:48,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:40:48 BoogieIcfgContainer [2022-03-19 03:40:48,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 03:40:48,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 03:40:48,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 03:40:48,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 03:40:48,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 03:40:47" (1/3) ... [2022-03-19 03:40:48,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6003d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:40:48, skipping insertion in model container [2022-03-19 03:40:48,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:40:47" (2/3) ... [2022-03-19 03:40:48,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6003d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:40:48, skipping insertion in model container [2022-03-19 03:40:48,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:40:48" (3/3) ... [2022-03-19 03:40:48,135 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound5.c [2022-03-19 03:40:48,138 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 03:40:48,139 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 03:40:48,165 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 03:40:48,169 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 03:40:48,170 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 03:40:48,178 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) [2022-03-19 03:40:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 03:40:48,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:40:48,183 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:40:48,183 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:40:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:40:48,186 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2022-03-19 03:40:48,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:48,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005269874] [2022-03-19 03:40:48,199 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:40:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 2 times [2022-03-19 03:40:48,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:40:48,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909102375] [2022-03-19 03:40:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:40:48,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:40:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:40:48,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:40:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:40:48,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:40:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:40:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:40:48,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:40:48,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909102375] [2022-03-19 03:40:48,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909102375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:48,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:48,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:40:48,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:40:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005269874] [2022-03-19 03:40:48,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005269874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:48,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:48,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:40:48,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862487623] [2022-03-19 03:40:48,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:40:48,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 03:40:48,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 03:40:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 03:40:48,443 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) [2022-03-19 03:40:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:40:48,512 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-03-19 03:40:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 03:40:48,514 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 [2022-03-19 03:40:48,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:40:48,519 INFO L225 Difference]: With dead ends: 63 [2022-03-19 03:40:48,519 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 03:40:48,521 INFO L911 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 [2022-03-19 03:40:48,523 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:40:48,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:40:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 03:40:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 03:40:48,546 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) [2022-03-19 03:40:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-03-19 03:40:48,548 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-03-19 03:40:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:40:48,548 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-03-19 03:40:48,548 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) [2022-03-19 03:40:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-03-19 03:40:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 03:40:48,549 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:40:48,549 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:40:48,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 03:40:48,549 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:40:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:40:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2022-03-19 03:40:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:48,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354075395] [2022-03-19 03:40:48,551 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:40:48,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 2 times [2022-03-19 03:40:48,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:40:48,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834808443] [2022-03-19 03:40:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:40:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:40:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:40:48,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:40:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:40:48,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:40:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:40:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:40:48,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:40:48,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834808443] [2022-03-19 03:40:48,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834808443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:48,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:48,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:40:48,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:40:48,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354075395] [2022-03-19 03:40:48,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354075395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:48,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:48,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:40:48,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159200580] [2022-03-19 03:40:48,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:40:48,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 03:40:48,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:48,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 03:40:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:40:48,682 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) [2022-03-19 03:40:48,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:40:48,884 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-03-19 03:40:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 03:40:48,886 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 [2022-03-19 03:40:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:40:48,887 INFO L225 Difference]: With dead ends: 37 [2022-03-19 03:40:48,888 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 03:40:48,888 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 03:40:48,889 INFO L912 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 [2022-03-19 03:40:48,889 INFO L913 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] [2022-03-19 03:40:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 03:40:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 03:40:48,897 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) [2022-03-19 03:40:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-19 03:40:48,899 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-03-19 03:40:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:40:48,900 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-19 03:40:48,900 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) [2022-03-19 03:40:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-19 03:40:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 03:40:48,900 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:40:48,901 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:40:48,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 03:40:48,902 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:40:48,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:40:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2022-03-19 03:40:48,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:48,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1840703731] [2022-03-19 03:40:48,907 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:40:48,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 2 times [2022-03-19 03:40:48,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:40:48,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295545792] [2022-03-19 03:40:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:40:48,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:40:48,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:40:48,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184368636] [2022-03-19 03:40:48,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:40:48,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:40:48,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:40:48,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:40:48,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 03:40:48,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:40:48,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:40:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 03:40:48,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:40:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:40:49,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:40:49,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:40:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295545792] [2022-03-19 03:40:49,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:40:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184368636] [2022-03-19 03:40:49,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184368636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:49,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:49,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:40:49,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:40:49,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1840703731] [2022-03-19 03:40:49,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1840703731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:49,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:49,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:40:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842350454] [2022-03-19 03:40:49,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:40:49,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:40:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:40:49,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:40:49,097 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) [2022-03-19 03:40:49,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:40:49,159 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-03-19 03:40:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:40:49,160 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 [2022-03-19 03:40:49,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:40:49,162 INFO L225 Difference]: With dead ends: 54 [2022-03-19 03:40:49,162 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 03:40:49,163 INFO L911 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 [2022-03-19 03:40:49,164 INFO L912 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 [2022-03-19 03:40:49,165 INFO L913 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] [2022-03-19 03:40:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 03:40:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-03-19 03:40:49,173 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) [2022-03-19 03:40:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-03-19 03:40:49,174 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-03-19 03:40:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:40:49,175 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-03-19 03:40:49,175 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) [2022-03-19 03:40:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-03-19 03:40:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 03:40:49,175 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:40:49,175 INFO L500 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] [2022-03-19 03:40:49,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 03:40:49,393 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 [2022-03-19 03:40:49,394 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:40:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:40:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2022-03-19 03:40:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:49,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [262178038] [2022-03-19 03:40:49,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:40:49,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 2 times [2022-03-19 03:40:49,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:40:49,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911052533] [2022-03-19 03:40:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:40:49,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:40:49,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:40:49,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196286985] [2022-03-19 03:40:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:40:49,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:40:49,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:40:49,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:40:49,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 03:40:49,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:40:49,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:40:49,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 03:40:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:40:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:40:49,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:40:49,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:40:49,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911052533] [2022-03-19 03:40:49,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:40:49,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196286985] [2022-03-19 03:40:49,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196286985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:49,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:49,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:40:49,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:40:49,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [262178038] [2022-03-19 03:40:49,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [262178038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:49,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:49,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:40:49,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506451839] [2022-03-19 03:40:49,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:40:49,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:40:49,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:40:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:40:49,540 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) [2022-03-19 03:40:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:40:49,581 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-03-19 03:40:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:40:49,581 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 [2022-03-19 03:40:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:40:49,582 INFO L225 Difference]: With dead ends: 58 [2022-03-19 03:40:49,582 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 03:40:49,582 INFO L911 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 [2022-03-19 03:40:49,583 INFO L912 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 [2022-03-19 03:40:49,583 INFO L913 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] [2022-03-19 03:40:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 03:40:49,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-19 03:40:49,591 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) [2022-03-19 03:40:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-03-19 03:40:49,592 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-03-19 03:40:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:40:49,592 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-03-19 03:40:49,592 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) [2022-03-19 03:40:49,593 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-03-19 03:40:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 03:40:49,593 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:40:49,593 INFO L500 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] [2022-03-19 03:40:49,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 03:40:49,818 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 [2022-03-19 03:40:49,818 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:40:49,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:40:49,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2022-03-19 03:40:49,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:49,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [882659800] [2022-03-19 03:40:49,819 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:40:49,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 2 times [2022-03-19 03:40:49,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:40:49,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880414620] [2022-03-19 03:40:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:40:49,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:40:49,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:40:49,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671471823] [2022-03-19 03:40:49,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:40:49,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:40:49,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:40:49,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:40:49,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 03:40:49,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:40:49,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:40:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:40:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:40:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 03:40:49,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:40:49,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:40:49,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880414620] [2022-03-19 03:40:49,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:40:49,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671471823] [2022-03-19 03:40:49,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671471823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:49,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:49,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:40:49,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:40:49,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [882659800] [2022-03-19 03:40:49,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [882659800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:49,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:49,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:40:49,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105407809] [2022-03-19 03:40:49,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:40:49,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:40:49,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:40:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:40:49,953 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) [2022-03-19 03:40:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:40:50,010 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-03-19 03:40:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:40:50,010 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 [2022-03-19 03:40:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:40:50,011 INFO L225 Difference]: With dead ends: 66 [2022-03-19 03:40:50,011 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 03:40:50,012 INFO L911 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 [2022-03-19 03:40:50,012 INFO L912 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 [2022-03-19 03:40:50,012 INFO L913 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] [2022-03-19 03:40:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 03:40:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 03:40:50,020 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) [2022-03-19 03:40:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-19 03:40:50,020 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-03-19 03:40:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:40:50,021 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-19 03:40:50,021 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) [2022-03-19 03:40:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-19 03:40:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 03:40:50,021 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:40:50,022 INFO L500 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] [2022-03-19 03:40:50,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 03:40:50,239 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 [2022-03-19 03:40:50,239 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:40:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:40:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2022-03-19 03:40:50,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [700491522] [2022-03-19 03:41:41,376 WARN L232 SmtUtils]: Spent 50.90s 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) [2022-03-19 03:41:41,383 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 [2022-03-19 03:41:41,385 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:41:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1018400594, now seen corresponding path program 1 times [2022-03-19 03:41:41,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:41:41,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218479190] [2022-03-19 03:41:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:41:41,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:41:41,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:41:41,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019209104] [2022-03-19 03:41:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:41:41,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:41:41,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:41:41,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:41:41,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 03:41:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:41:41,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 03:41:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:41:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:41:46,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:42:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:42:13,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:42:13,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218479190] [2022-03-19 03:42:13,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:42:13,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019209104] [2022-03-19 03:42:13,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019209104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:42:13,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:42:13,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-19 03:43:44,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:43:44,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [700491522] [2022-03-19 03:43:44,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [700491522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:43:44,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:43:44,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 03:43:44,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579801258] [2022-03-19 03:43:44,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:43:44,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 03:43:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 03:43:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=972, Unknown=28, NotChecked=0, Total=1190 [2022-03-19 03:43:44,222 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) [2022-03-19 03:43:52,476 WARN L232 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 116 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:44:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:44:22,478 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-03-19 03:44:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 03:44:22,479 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 [2022-03-19 03:44:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:44:22,480 INFO L225 Difference]: With dead ends: 74 [2022-03-19 03:44:22,480 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 03:44:22,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 130.5s TimeCoverageRelationStatistics Valid=271, Invalid=1337, Unknown=32, NotChecked=0, Total=1640 [2022-03-19 03:44:22,482 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:44:22,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 375 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 113 Unchecked, 0.5s Time] [2022-03-19 03:44:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 03:44:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-03-19 03:44:22,495 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) [2022-03-19 03:44:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-03-19 03:44:22,495 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 49 [2022-03-19 03:44:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:44:22,496 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-03-19 03:44:22,496 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) [2022-03-19 03:44:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-03-19 03:44:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 03:44:22,497 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:44:22,497 INFO L500 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] [2022-03-19 03:44:22,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 03:44:22,702 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 [2022-03-19 03:44:22,703 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:44:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:44:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 2 times [2022-03-19 03:44:22,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:22,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [788328013] [2022-03-19 03:45:54,073 WARN L232 SmtUtils]: Spent 1.52m 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) [2022-03-19 03:45:54,075 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 [2022-03-19 03:45:54,076 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:45:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1063970467, now seen corresponding path program 1 times [2022-03-19 03:45:54,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:45:54,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857020900] [2022-03-19 03:45:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:45:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:45:54,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:45:54,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16715419] [2022-03-19 03:45:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:45:54,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:45:54,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:45:54,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:45:54,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 03:45:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 03:45:54,410 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 03:45:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 03:45:54,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 03:45:54,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 3 times [2022-03-19 03:45:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:45:54,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383531979] [2022-03-19 03:45:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:45:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:45:54,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:45:54,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910757172] [2022-03-19 03:45:54,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 03:45:54,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:45:54,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:45:54,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:45:54,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 03:45:54,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 03:45:54,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:45:54,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 03:45:54,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:45:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 03:45:55,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:45:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 03:45:55,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:45:55,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383531979] [2022-03-19 03:45:55,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:45:55,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910757172] [2022-03-19 03:45:55,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910757172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:45:55,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:45:55,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-19 03:45:55,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:45:55,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [788328013] [2022-03-19 03:45:55,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [788328013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:45:55,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:45:55,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:45:55,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221191700] [2022-03-19 03:45:55,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:45:55,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 03:45:55,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:45:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 03:45:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 03:45:55,544 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) [2022-03-19 03:45:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:45:55,940 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-19 03:45:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 03:45:55,940 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 [2022-03-19 03:45:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:45:55,941 INFO L225 Difference]: With dead ends: 91 [2022-03-19 03:45:55,941 INFO L226 Difference]: Without dead ends: 89 [2022-03-19 03:45:55,942 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 03:45:55,942 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:45:55,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 238 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:45:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-19 03:45:55,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-03-19 03:45:55,956 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) [2022-03-19 03:45:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-03-19 03:45:55,957 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 54 [2022-03-19 03:45:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:45:55,957 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-03-19 03:45:55,957 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) [2022-03-19 03:45:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-03-19 03:45:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 03:45:55,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:45:55,958 INFO L500 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] [2022-03-19 03:45:55,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 03:45:56,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 03:45:56,358 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 [2022-03-19 03:45:56,359 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:45:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:45:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1546120389, now seen corresponding path program 4 times [2022-03-19 03:45:56,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:45:56,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [580007716] [2022-03-19 03:48:18,199 WARN L232 SmtUtils]: Spent 2.36m 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) [2022-03-19 03:48:18,202 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 [2022-03-19 03:48:18,203 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:48:18,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1624834318, now seen corresponding path program 1 times [2022-03-19 03:48:18,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:48:18,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392621356] [2022-03-19 03:48:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:48:18,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:48:18,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:48:18,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944114446] [2022-03-19 03:48:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:48:18,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:48:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:48:18,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:48:18,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 03:48:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:48:18,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 03:48:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:48:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 03:48:25,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:48:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 03:48:27,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:48:27,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392621356] [2022-03-19 03:48:27,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:48:27,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944114446] [2022-03-19 03:48:27,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944114446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:48:27,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:48:27,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-03-19 03:50:05,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:50:05,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [580007716] [2022-03-19 03:50:05,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [580007716] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:50:05,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:50:05,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 03:50:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824443673] [2022-03-19 03:50:05,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:50:05,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 03:50:05,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:50:05,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 03:50:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1033, Unknown=30, NotChecked=0, Total=1260 [2022-03-19 03:50:05,925 INFO L87 Difference]: Start difference. First operand 80 states and 91 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, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-19 03:50:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:50:22,906 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-03-19 03:50:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 03:50:22,907 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, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 59 [2022-03-19 03:50:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:50:22,909 INFO L225 Difference]: With dead ends: 94 [2022-03-19 03:50:22,909 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 03:50:22,909 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 116.3s TimeCoverageRelationStatistics Valid=255, Invalid=1354, Unknown=31, NotChecked=0, Total=1640 [2022-03-19 03:50:22,910 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:50:22,910 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 335 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-03-19 03:50:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 03:50:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-19 03:50:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 22 states have call successors, (22), 17 states have call predecessors, (22), 15 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-19 03:50:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-03-19 03:50:22,937 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 59 [2022-03-19 03:50:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:50:22,937 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-03-19 03:50:22,937 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, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-19 03:50:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-03-19 03:50:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 03:50:22,938 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:50:22,938 INFO L500 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] [2022-03-19 03:50:22,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 03:50:23,144 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 [2022-03-19 03:50:23,144 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:50:23,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:50:23,145 INFO L85 PathProgramCache]: Analyzing trace with hash -389057674, now seen corresponding path program 5 times [2022-03-19 03:50:23,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:50:23,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1605027725] [2022-03-19 03:52:26,094 WARN L232 SmtUtils]: Spent 2.05m on a formula simplification. DAG size of input: 195 DAG size of output: 188 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-19 03:52:26,097 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 [2022-03-19 03:52:26,098 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:52:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash 746353091, now seen corresponding path program 1 times [2022-03-19 03:52:26,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:52:26,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179197130] [2022-03-19 03:52:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:52:26,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:52:26,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:52:26,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616533056] [2022-03-19 03:52:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:52:26,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:52:26,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:52:26,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:52:26,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 03:52:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:52:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 03:52:26,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:52:59,952 WARN L232 SmtUtils]: Spent 14.90s on a formula simplification. DAG size of input: 114 DAG size of output: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:53:24,380 WARN L232 SmtUtils]: Spent 10.65s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:53:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:53:28,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:53:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 03:53:44,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:53:44,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179197130] [2022-03-19 03:53:44,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:53:44,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616533056] [2022-03-19 03:53:44,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616533056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:53:44,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:53:44,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17