/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 02:26:24,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 02:26:24,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 02:26:24,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 02:26:24,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 02:26:24,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 02:26:24,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 02:26:24,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 02:26:24,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 02:26:24,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 02:26:24,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 02:26:24,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 02:26:24,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 02:26:24,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 02:26:24,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 02:26:24,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 02:26:24,989 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 02:26:24,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 02:26:24,989 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 02:26:24,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 02:26:24,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 02:26:24,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 02:26:24,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 02:26:24,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:26:24,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 02:26:24,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 02:26:24,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 02:26:24,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 02:26:24,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 02:26:24,991 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 02:26:24,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 02:26:24,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 02:26:24,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 02:26:25,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 02:26:25,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 02:26:25,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 02:26:25,221 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 02:26:25,223 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 02:26:25,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2022-03-20 02:26:25,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af73c8c7/7695dcc8525d412394c45b5c7995fa97/FLAGf54bf1388 [2022-03-20 02:26:25,591 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 02:26:25,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2022-03-20 02:26:25,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af73c8c7/7695dcc8525d412394c45b5c7995fa97/FLAGf54bf1388 [2022-03-20 02:26:25,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af73c8c7/7695dcc8525d412394c45b5c7995fa97 [2022-03-20 02:26:25,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 02:26:25,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 02:26:25,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 02:26:25,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 02:26:25,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 02:26:25,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2448fe1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25, skipping insertion in model container [2022-03-20 02:26:25,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 02:26:25,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 02:26:25,788 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/ps6-ll_valuebound50.c[458,471] [2022-03-20 02:26:25,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:26:25,818 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 02:26:25,834 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/ps6-ll_valuebound50.c[458,471] [2022-03-20 02:26:25,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:26:25,860 INFO L208 MainTranslator]: Completed translation [2022-03-20 02:26:25,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25 WrapperNode [2022-03-20 02:26:25,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 02:26:25,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 02:26:25,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 02:26:25,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 02:26:25,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 02:26:25,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 02:26:25,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 02:26:25,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 02:26:25,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25" (1/1) ... [2022-03-20 02:26:25,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:26:25,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:25,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 02:26:25,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 02:26:25,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 02:26:25,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 02:26:25,953 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 02:26:25,954 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 02:26:25,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 02:26:25,954 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 02:26:25,954 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 02:26:25,954 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 02:26:25,954 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 02:26:25,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 02:26:26,006 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 02:26:26,007 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 02:26:26,136 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 02:26:26,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 02:26:26,140 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 02:26:26,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:26:26 BoogieIcfgContainer [2022-03-20 02:26:26,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 02:26:26,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 02:26:26,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 02:26:26,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 02:26:26,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:26:25" (1/3) ... [2022-03-20 02:26:26,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b965967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:26:26, skipping insertion in model container [2022-03-20 02:26:26,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:25" (2/3) ... [2022-03-20 02:26:26,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b965967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:26:26, skipping insertion in model container [2022-03-20 02:26:26,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:26:26" (3/3) ... [2022-03-20 02:26:26,147 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound50.c [2022-03-20 02:26:26,150 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 02:26:26,151 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 02:26:26,180 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 02:26:26,184 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 02:26:26,185 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 02:26:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 02:26:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 02:26:26,199 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:26,199 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:26,200 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:26,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2022-03-20 02:26:26,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820996075] [2022-03-20 02:26:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:26,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:26:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:26,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:26:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:26,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 02:26:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 02:26:26,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:26,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820996075] [2022-03-20 02:26:26,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820996075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:26,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:26,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 02:26:26,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9170265] [2022-03-20 02:26:26,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:26,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 02:26:26,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 02:26:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 02:26:26,442 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 02:26:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:26,521 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-03-20 02:26:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 02:26:26,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 02:26:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:26,530 INFO L225 Difference]: With dead ends: 51 [2022-03-20 02:26:26,531 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 02:26:26,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 02:26:26,537 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:26,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 02:26:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-20 02:26:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 02:26:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 02:26:26,570 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-20 02:26:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:26,570 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 02:26:26,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 02:26:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 02:26:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 02:26:26,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:26,572 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:26,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 02:26:26,573 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2022-03-20 02:26:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:26,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763398595] [2022-03-20 02:26:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:26,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:26,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095055548] [2022-03-20 02:26:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:26,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:26,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:26,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:26,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 02:26:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:26,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 02:26:26,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 02:26:26,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 02:26:26,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:26,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763398595] [2022-03-20 02:26:26,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:26,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095055548] [2022-03-20 02:26:26,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095055548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:26,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:26,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 02:26:26,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115376710] [2022-03-20 02:26:26,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:26,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:26,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:26:26,786 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 02:26:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:26,835 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-20 02:26:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:26:26,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 02:26:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:26,837 INFO L225 Difference]: With dead ends: 35 [2022-03-20 02:26:26,837 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 02:26:26,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:26:26,838 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:26,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 02:26:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 02:26:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 02:26:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-20 02:26:26,845 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-03-20 02:26:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:26,845 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-20 02:26:26,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 02:26:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-20 02:26:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 02:26:26,846 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:26,846 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:26,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:27,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:27,060 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2022-03-20 02:26:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:27,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116343707] [2022-03-20 02:26:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:27,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:27,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970026602] [2022-03-20 02:26:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:27,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:27,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:27,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:27,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 02:26:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:27,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 02:26:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 02:26:27,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 02:26:27,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116343707] [2022-03-20 02:26:27,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970026602] [2022-03-20 02:26:27,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970026602] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 02:26:27,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:26:27,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 02:26:27,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078365839] [2022-03-20 02:26:27,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:27,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:27,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:27,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:27,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 02:26:27,554 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 02:26:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:27,602 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-03-20 02:26:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:26:27,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-20 02:26:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:27,604 INFO L225 Difference]: With dead ends: 37 [2022-03-20 02:26:27,604 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 02:26:27,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:26:27,607 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:27,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 02:26:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 02:26:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 02:26:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-20 02:26:27,617 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-20 02:26:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:27,617 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-20 02:26:27,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 02:26:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-20 02:26:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 02:26:27,618 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:27,618 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:27,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:27,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 02:26:27,819 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2022-03-20 02:26:27,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:27,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711882925] [2022-03-20 02:26:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:27,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:27,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:27,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539140699] [2022-03-20 02:26:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:27,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:27,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:27,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:27,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 02:26:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 02:26:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 02:26:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:28,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:28,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711882925] [2022-03-20 02:26:28,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:28,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539140699] [2022-03-20 02:26:28,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539140699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:26:28,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:26:28,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 02:26:28,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420736539] [2022-03-20 02:26:28,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:28,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 02:26:28,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:28,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 02:26:28,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:26:28,185 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 02:26:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:28,241 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-20 02:26:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 02:26:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-03-20 02:26:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:28,243 INFO L225 Difference]: With dead ends: 42 [2022-03-20 02:26:28,243 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 02:26:28,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:26:28,244 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:28,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 02:26:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 02:26:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 02:26:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-20 02:26:28,249 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-03-20 02:26:28,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:28,250 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-20 02:26:28,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 02:26:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-20 02:26:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 02:26:28,251 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:28,251 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:28,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:28,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:28,463 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 2 times [2022-03-20 02:26:28,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894980781] [2022-03-20 02:26:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:28,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:28,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:28,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670673772] [2022-03-20 02:26:28,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 02:26:28,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:28,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:28,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:28,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 02:26:28,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 02:26:28,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:26:28,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 02:26:28,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 02:26:28,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:28,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:28,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894980781] [2022-03-20 02:26:28,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:28,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670673772] [2022-03-20 02:26:28,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670673772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:26:28,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:26:28,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 02:26:28,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468158029] [2022-03-20 02:26:28,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:28,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 02:26:28,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 02:26:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:26:28,880 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 02:26:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:28,948 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-03-20 02:26:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 02:26:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-03-20 02:26:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:28,950 INFO L225 Difference]: With dead ends: 45 [2022-03-20 02:26:28,950 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 02:26:28,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:26:28,951 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:28,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 02:26:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 02:26:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 02:26:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-03-20 02:26:28,962 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-03-20 02:26:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:28,963 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-03-20 02:26:28,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 02:26:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-03-20 02:26:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 02:26:28,966 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:28,967 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:28,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:29,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:29,183 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:29,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 3 times [2022-03-20 02:26:29,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:29,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098606711] [2022-03-20 02:26:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:29,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:29,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:29,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710512772] [2022-03-20 02:26:29,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 02:26:29,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:29,194 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:29,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 02:26:29,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 02:26:29,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:26:29,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 02:26:29,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 02:26:29,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:29,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098606711] [2022-03-20 02:26:29,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710512772] [2022-03-20 02:26:29,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710512772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:26:29,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:26:29,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 02:26:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226562349] [2022-03-20 02:26:29,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:29,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 02:26:29,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 02:26:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:26:29,628 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-20 02:26:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:29,707 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-20 02:26:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 02:26:29,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-03-20 02:26:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:29,708 INFO L225 Difference]: With dead ends: 48 [2022-03-20 02:26:29,708 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 02:26:29,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:26:29,709 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:29,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:26:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 02:26:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-20 02:26:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 02:26:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-20 02:26:29,715 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-03-20 02:26:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:29,715 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-20 02:26:29,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-20 02:26:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-20 02:26:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 02:26:29,716 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:29,716 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:29,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:29,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:29,924 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 4 times [2022-03-20 02:26:29,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:29,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770089776] [2022-03-20 02:26:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:29,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:29,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:29,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384178214] [2022-03-20 02:26:29,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 02:26:29,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:29,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:29,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:29,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 02:26:29,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 02:26:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:26:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 02:26:29,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 02:26:30,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:30,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:30,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770089776] [2022-03-20 02:26:30,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:30,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384178214] [2022-03-20 02:26:30,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384178214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:26:30,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:26:30,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 02:26:30,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159232215] [2022-03-20 02:26:30,301 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:30,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 02:26:30,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 02:26:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:26:30,302 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 02:26:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:30,391 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-03-20 02:26:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:26:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-03-20 02:26:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:30,392 INFO L225 Difference]: With dead ends: 51 [2022-03-20 02:26:30,392 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 02:26:30,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:26:30,393 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:30,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:26:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 02:26:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 02:26:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 02:26:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-03-20 02:26:30,398 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-03-20 02:26:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:30,399 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-03-20 02:26:30,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 02:26:30,399 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-03-20 02:26:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 02:26:30,400 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:30,400 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:30,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:30,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:30,601 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 5 times [2022-03-20 02:26:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:30,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955074958] [2022-03-20 02:26:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:30,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:30,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:30,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81104569] [2022-03-20 02:26:30,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 02:26:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:30,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:30,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:30,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 02:26:31,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 02:26:31,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:26:31,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 02:26:31,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 02:26:31,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:31,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:31,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955074958] [2022-03-20 02:26:31,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:31,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81104569] [2022-03-20 02:26:31,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81104569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:26:31,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:26:31,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 02:26:31,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228770446] [2022-03-20 02:26:31,460 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:31,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 02:26:31,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:31,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 02:26:31,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:26:31,461 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-20 02:26:31,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:31,564 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-03-20 02:26:31,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 02:26:31,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-03-20 02:26:31,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:31,565 INFO L225 Difference]: With dead ends: 54 [2022-03-20 02:26:31,565 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 02:26:31,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:26:31,566 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:31,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 339 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:26:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 02:26:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-20 02:26:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 02:26:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-03-20 02:26:31,572 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-03-20 02:26:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:31,572 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-03-20 02:26:31,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-20 02:26:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-03-20 02:26:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 02:26:31,573 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:31,573 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:31,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:31,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:31,773 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:31,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:31,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 6 times [2022-03-20 02:26:31,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:31,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276781834] [2022-03-20 02:26:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:31,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:31,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:31,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836174777] [2022-03-20 02:26:31,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 02:26:31,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:31,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:31,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:31,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 02:26:32,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 02:26:32,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:26:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 02:26:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 47 proven. 68 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-20 02:26:32,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:36,678 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* (- 18) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* (- 119) c_main_~y~0 c_main_~y~0)) (.cse3 (* (- 65) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (not (= (mod (+ .cse0 .cse1 .cse2 (* (- 120) c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse3) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse4 (+ c_main_~y~0 1))) (= (* .cse4 .cse4) (* main_~k~0 .cse4))))) (not (<= (+ (* 10 (* c_main_~y~0 c_main_~y~0)) (* 5 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1) (div (+ .cse0 .cse1 .cse2 (- 12) .cse3) (- 12)))))) is different from false [2022-03-20 02:26:40,735 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 5) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0)))))) is different from false [2022-03-20 02:26:40,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:40,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276781834] [2022-03-20 02:26:40,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:40,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836174777] [2022-03-20 02:26:40,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836174777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:26:40,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:26:40,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 02:26:40,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222160538] [2022-03-20 02:26:40,738 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:40,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 02:26:40,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:40,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 02:26:40,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=326, Unknown=2, NotChecked=74, Total=462 [2022-03-20 02:26:40,739 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 02:26:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:40,950 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-03-20 02:26:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 02:26:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-03-20 02:26:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:40,952 INFO L225 Difference]: With dead ends: 57 [2022-03-20 02:26:40,952 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 02:26:40,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=81, Invalid=431, Unknown=2, NotChecked=86, Total=600 [2022-03-20 02:26:40,952 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:40,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 403 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 02:26:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 02:26:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 02:26:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 02:26:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-20 02:26:40,959 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-03-20 02:26:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:40,959 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-20 02:26:40,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 02:26:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-20 02:26:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 02:26:40,960 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:40,960 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:40,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:41,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 02:26:41,161 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 7 times [2022-03-20 02:26:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:41,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131844693] [2022-03-20 02:26:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:41,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:41,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:41,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542974300] [2022-03-20 02:26:41,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 02:26:41,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:41,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:41,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 02:27:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:55,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 02:27:55,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:27:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 02:27:55,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:27:55,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:55,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131844693] [2022-03-20 02:27:55,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:27:55,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542974300] [2022-03-20 02:27:55,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542974300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:27:55,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:27:55,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 02:27:55,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085712904] [2022-03-20 02:27:55,757 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:27:55,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 02:27:55,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:55,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 02:27:55,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:27:55,758 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-20 02:27:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:55,931 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-03-20 02:27:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 02:27:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-03-20 02:27:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:55,932 INFO L225 Difference]: With dead ends: 60 [2022-03-20 02:27:55,932 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 02:27:55,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-20 02:27:55,933 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:55,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 455 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:27:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 02:27:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 02:27:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 02:27:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-03-20 02:27:55,948 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-03-20 02:27:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:55,949 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-03-20 02:27:55,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-20 02:27:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-03-20 02:27:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 02:27:55,950 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:55,950 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:56,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 02:27:56,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 02:27:56,151 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 8 times [2022-03-20 02:27:56,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:56,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639343256] [2022-03-20 02:27:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:56,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:27:56,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243877841] [2022-03-20 02:27:56,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 02:27:56,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:27:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:27:56,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:27:56,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 02:27:56,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 02:27:56,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:27:56,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 02:27:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:27:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 02:27:57,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:27:57,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:57,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639343256] [2022-03-20 02:27:57,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:27:57,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243877841] [2022-03-20 02:27:57,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243877841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:27:57,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:27:57,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 02:27:57,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829017503] [2022-03-20 02:27:57,528 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:27:57,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 02:27:57,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 02:27:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-03-20 02:27:57,529 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-20 02:27:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:57,712 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-03-20 02:27:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 02:27:57,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-03-20 02:27:57,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:57,713 INFO L225 Difference]: With dead ends: 63 [2022-03-20 02:27:57,714 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 02:27:57,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-03-20 02:27:57,714 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:57,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:27:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 02:27:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 02:27:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 02:27:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-03-20 02:27:57,721 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-03-20 02:27:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:57,721 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-03-20 02:27:57,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-20 02:27:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-03-20 02:27:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 02:27:57,722 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:57,722 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:57,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 02:27:57,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 02:27:57,930 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 9 times [2022-03-20 02:27:57,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:57,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724590699] [2022-03-20 02:27:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:57,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:57,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:27:57,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035468645] [2022-03-20 02:27:57,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 02:27:57,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:27:57,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:27:57,952 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:27:57,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 02:28:03,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-20 02:28:03,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:28:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 02:28:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:28:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 22 proven. 135 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 02:28:04,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:28:04,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:04,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724590699] [2022-03-20 02:28:04,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:28:04,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035468645] [2022-03-20 02:28:04,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035468645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:28:04,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:28:04,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 02:28:04,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696414894] [2022-03-20 02:28:04,394 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:28:04,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 02:28:04,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 02:28:04,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-20 02:28:04,394 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 02:28:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:04,590 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-03-20 02:28:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 02:28:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 96 [2022-03-20 02:28:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:04,591 INFO L225 Difference]: With dead ends: 66 [2022-03-20 02:28:04,591 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 02:28:04,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:28:04,592 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:04,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 587 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 02:28:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 02:28:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-20 02:28:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 02:28:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-03-20 02:28:04,598 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 96 [2022-03-20 02:28:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:04,599 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-03-20 02:28:04,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 02:28:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-03-20 02:28:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 02:28:04,599 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:04,599 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:04,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 02:28:04,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 02:28:04,812 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:04,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1610181715, now seen corresponding path program 10 times [2022-03-20 02:28:04,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:04,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683073206] [2022-03-20 02:28:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:04,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:04,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:28:04,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533090771] [2022-03-20 02:28:04,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 02:28:04,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:28:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:28:04,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:28:04,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 02:28:04,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 02:28:04,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:28:04,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 02:28:04,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:28:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 02:28:05,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:28:05,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683073206] [2022-03-20 02:28:05,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:28:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533090771] [2022-03-20 02:28:05,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533090771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:28:05,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:28:05,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 02:28:05,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158671993] [2022-03-20 02:28:05,410 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:28:05,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 02:28:05,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:05,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 02:28:05,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:28:05,411 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-03-20 02:28:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:05,624 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-20 02:28:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 02:28:05,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 103 [2022-03-20 02:28:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:05,625 INFO L225 Difference]: With dead ends: 69 [2022-03-20 02:28:05,625 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 02:28:05,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:28:05,627 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 2 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:05,627 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 659 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 02:28:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 02:28:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-20 02:28:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 02:28:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-03-20 02:28:05,633 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 103 [2022-03-20 02:28:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:05,633 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-03-20 02:28:05,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-03-20 02:28:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-03-20 02:28:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 02:28:05,635 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:05,635 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:05,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 02:28:05,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 02:28:05,843 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:05,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1881400669, now seen corresponding path program 11 times [2022-03-20 02:28:05,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:05,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382558836] [2022-03-20 02:28:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:05,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:05,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:28:05,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943679995] [2022-03-20 02:28:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 02:28:05,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:28:05,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:28:05,861 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:28:05,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 02:28:28,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 02:28:28,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:28:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 02:28:28,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:28:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 26 proven. 198 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 02:28:28,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:28:28,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382558836] [2022-03-20 02:28:28,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:28:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943679995] [2022-03-20 02:28:28,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943679995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:28:28,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:28:28,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 02:28:28,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50466603] [2022-03-20 02:28:28,886 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:28:28,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 02:28:28,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 02:28:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:28:28,887 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-03-20 02:28:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:29,163 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-03-20 02:28:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 02:28:29,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 110 [2022-03-20 02:28:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:29,167 INFO L225 Difference]: With dead ends: 72 [2022-03-20 02:28:29,167 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 02:28:29,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-20 02:28:29,171 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:29,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 735 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 02:28:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 02:28:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-03-20 02:28:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 02:28:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-03-20 02:28:29,184 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 110 [2022-03-20 02:28:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:29,185 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-03-20 02:28:29,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-03-20 02:28:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-03-20 02:28:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 02:28:29,188 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:29,188 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:29,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 02:28:29,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 02:28:29,395 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:29,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:29,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1600671149, now seen corresponding path program 12 times [2022-03-20 02:28:29,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:29,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841162749] [2022-03-20 02:28:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:29,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:29,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:28:29,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434943340] [2022-03-20 02:28:29,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 02:28:29,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:28:29,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:28:29,404 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:28:29,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process