/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:59:25,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:59:25,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:59:25,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 20:59:25,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:59:25,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:59:25,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:59:25,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 20:59:25,685 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:59:25,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:59:25,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:59:25,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:59:25,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:59:25,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:59:25,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:59:25,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:59:25,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:59:25,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:59:25,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:59:25,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:59:25,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:59:25,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:59:25,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:59:25,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:59:25,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:59:25,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:59:25,688 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:59:25,688 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:59:25,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:59:25,688 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:59:25,688 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:59:25,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:59:25,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:59:25,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:59:25,852 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:59:25,859 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:59:25,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-03-20 20:59:25,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf3a952e/5533251510584f378c1dad9a1335eaf4/FLAG2e6e1fac0 [2022-03-20 20:59:26,233 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:59:26,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-03-20 20:59:26,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf3a952e/5533251510584f378c1dad9a1335eaf4/FLAG2e6e1fac0 [2022-03-20 20:59:26,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf3a952e/5533251510584f378c1dad9a1335eaf4 [2022-03-20 20:59:26,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:59:26,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:59:26,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:59:26,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:59:26,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:59:26,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45563e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26, skipping insertion in model container [2022-03-20 20:59:26,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:59:26,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:59:26,806 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2022-03-20 20:59:26,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:59:26,824 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:59:26,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2022-03-20 20:59:26,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:59:26,843 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:59:26,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26 WrapperNode [2022-03-20 20:59:26,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:59:26,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:59:26,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:59:26,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:59:26,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:59:26,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:59:26,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:59:26,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:59:26,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26" (1/1) ... [2022-03-20 20:59:26,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:59:26,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:26,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 20:59:26,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 20:59:26,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:59:26,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:59:26,912 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:59:26,912 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:59:26,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:59:26,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:59:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:59:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:59:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:59:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:59:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:59:26,913 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:59:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:59:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:59:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:59:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:59:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:59:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:59:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:59:26,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:59:26,957 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:59:26,958 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:59:27,058 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:59:27,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:59:27,062 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 20:59:27,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:59:27 BoogieIcfgContainer [2022-03-20 20:59:27,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:59:27,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:59:27,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:59:27,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:59:27,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:59:26" (1/3) ... [2022-03-20 20:59:27,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e43f3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:59:27, skipping insertion in model container [2022-03-20 20:59:27,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:59:26" (2/3) ... [2022-03-20 20:59:27,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e43f3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:59:27, skipping insertion in model container [2022-03-20 20:59:27,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:59:27" (3/3) ... [2022-03-20 20:59:27,069 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2022-03-20 20:59:27,072 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:59:27,072 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:59:27,102 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:59:27,114 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 20:59:27,114 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:59:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:59:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 20:59:27,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:27,143 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:27,145 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-20 20:59:27,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:27,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1603478954] [2022-03-20 20:59:27,166 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:27,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 2 times [2022-03-20 20:59:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:27,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857676445] [2022-03-20 20:59:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:27,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:59:27,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:59:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:59:27,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:59:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:59:27,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 20:59:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:59:27,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 20:59:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:59:27,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 20:59:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:59:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 20:59:27,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:27,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857676445] [2022-03-20 20:59:27,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857676445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:27,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:27,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:59:27,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:27,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1603478954] [2022-03-20 20:59:27,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1603478954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:27,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:27,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:59:27,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435862000] [2022-03-20 20:59:27,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:27,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:59:27,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:59:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:59:27,334 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:59:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:27,400 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-20 20:59:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:59:27,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 20:59:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:27,409 INFO L225 Difference]: With dead ends: 73 [2022-03-20 20:59:27,409 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 20:59:27,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:59:27,413 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:27,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:59:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 20:59:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 20:59:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 20:59:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 20:59:27,452 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-20 20:59:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:27,454 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 20:59:27,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:59:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 20:59:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 20:59:27,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:27,457 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:27,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:59:27,457 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-20 20:59:27,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:27,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234398381] [2022-03-20 20:59:27,461 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 2 times [2022-03-20 20:59:27,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:27,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769298938] [2022-03-20 20:59:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:27,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:27,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:27,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290681625] [2022-03-20 20:59:27,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:27,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:27,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:27,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:27,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 20:59:27,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:59:27,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:27,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 20:59:27,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 20:59:27,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:59:27,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:27,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769298938] [2022-03-20 20:59:27,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:27,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290681625] [2022-03-20 20:59:27,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290681625] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:27,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:27,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:59:27,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:27,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234398381] [2022-03-20 20:59:27,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234398381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:27,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:27,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:59:27,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377333374] [2022-03-20 20:59:27,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:27,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:59:27,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:59:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:59:27,708 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 20:59:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:27,799 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 20:59:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:59:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 20:59:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:27,802 INFO L225 Difference]: With dead ends: 54 [2022-03-20 20:59:27,802 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 20:59:27,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:59:27,805 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:27,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:59:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 20:59:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 20:59:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 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 20:59:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 20:59:27,822 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2022-03-20 20:59:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:27,822 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 20:59:27,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 20:59:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 20:59:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 20:59:27,823 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:27,823 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:27,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:28,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:28,048 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:28,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-20 20:59:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:28,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [196666018] [2022-03-20 20:59:28,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:28,049 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 2 times [2022-03-20 20:59:28,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:28,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672589901] [2022-03-20 20:59:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:28,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:28,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:28,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054724256] [2022-03-20 20:59:28,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:28,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:28,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:28,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 20:59:28,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:28,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:59:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 20:59:28,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 20:59:28,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672589901] [2022-03-20 20:59:28,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054724256] [2022-03-20 20:59:28,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054724256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:28,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:28,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:59:28,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:28,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [196666018] [2022-03-20 20:59:28,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [196666018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:28,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:28,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:59:28,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850844145] [2022-03-20 20:59:28,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:28,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:59:28,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:28,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:59:28,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:59:28,377 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:59:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:28,508 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-20 20:59:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:59:28,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 20:59:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:28,514 INFO L225 Difference]: With dead ends: 103 [2022-03-20 20:59:28,514 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 20:59:28,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:59:28,521 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:28,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 288 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 20:59:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-20 20:59:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 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 20:59:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-20 20:59:28,534 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-20 20:59:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:28,534 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-20 20:59:28,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:59:28,535 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-20 20:59:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 20:59:28,535 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:28,535 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:28,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 20:59:28,752 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 20:59:28,753 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:28,753 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-20 20:59:28,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:28,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1360818877] [2022-03-20 20:59:28,754 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:28,754 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 2 times [2022-03-20 20:59:28,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:28,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126185726] [2022-03-20 20:59:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:28,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:28,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:28,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690855336] [2022-03-20 20:59:28,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:28,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:28,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:28,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:28,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 20:59:28,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:28,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 20:59:28,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 20:59:29,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 20:59:29,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:29,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126185726] [2022-03-20 20:59:29,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690855336] [2022-03-20 20:59:29,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690855336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:29,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:29,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-03-20 20:59:29,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1360818877] [2022-03-20 20:59:29,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1360818877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:29,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:29,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:29,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575980187] [2022-03-20 20:59:29,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:29,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:29,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:29,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:29,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:59:29,324 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 20:59:29,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:29,621 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2022-03-20 20:59:29,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:59:29,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-03-20 20:59:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:29,623 INFO L225 Difference]: With dead ends: 112 [2022-03-20 20:59:29,623 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 20:59:29,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:59:29,624 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:29,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 389 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 20:59:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-03-20 20:59:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 20:59:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-03-20 20:59:29,638 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2022-03-20 20:59:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:29,638 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-03-20 20:59:29,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 20:59:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-03-20 20:59:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 20:59:29,639 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:29,639 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:29,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:29,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:29,848 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:29,849 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-20 20:59:29,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:29,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52105095] [2022-03-20 20:59:29,849 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:29,849 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 2 times [2022-03-20 20:59:29,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:29,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534107316] [2022-03-20 20:59:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:29,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:29,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:29,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816377168] [2022-03-20 20:59:29,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:29,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:29,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:29,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:29,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 20:59:29,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:29,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:29,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 20:59:29,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:59:30,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:30,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:30,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534107316] [2022-03-20 20:59:30,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:30,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816377168] [2022-03-20 20:59:30,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816377168] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:59:30,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:59:30,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 20:59:30,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:30,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52105095] [2022-03-20 20:59:30,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52105095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:30,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:30,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:30,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913701096] [2022-03-20 20:59:30,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:30,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:59:30,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:30,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:59:30,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:59:30,141 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:30,187 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2022-03-20 20:59:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:59:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-20 20:59:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:30,190 INFO L225 Difference]: With dead ends: 130 [2022-03-20 20:59:30,190 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 20:59:30,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:59:30,192 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:30,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:59:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 20:59:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-03-20 20:59:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 76 states have (on average 1.263157894736842) internal successors, (96), 77 states have internal predecessors, (96), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 20:59:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2022-03-20 20:59:30,223 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 47 [2022-03-20 20:59:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:30,223 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2022-03-20 20:59:30,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2022-03-20 20:59:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 20:59:30,224 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:30,224 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:30,244 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 20:59:30,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:30,424 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-03-20 20:59:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:30,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [973031084] [2022-03-20 20:59:30,425 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 2 times [2022-03-20 20:59:30,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:30,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552879351] [2022-03-20 20:59:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:30,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:30,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546016434] [2022-03-20 20:59:30,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:30,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:30,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:30,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:30,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 20:59:30,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:30,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:30,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 20:59:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 20:59:30,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 20:59:30,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552879351] [2022-03-20 20:59:30,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546016434] [2022-03-20 20:59:30,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546016434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:30,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:30,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-20 20:59:30,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [973031084] [2022-03-20 20:59:30,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [973031084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:30,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:30,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:59:30,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815157937] [2022-03-20 20:59:30,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:30,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:59:30,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:59:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:59:30,855 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 20:59:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:31,014 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2022-03-20 20:59:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:59:31,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-20 20:59:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:31,017 INFO L225 Difference]: With dead ends: 137 [2022-03-20 20:59:31,017 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 20:59:31,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:59:31,018 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 87 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:31,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 254 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 20:59:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-03-20 20:59:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 83 states have internal predecessors, (102), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 20:59:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-03-20 20:59:31,055 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 47 [2022-03-20 20:59:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:31,056 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-03-20 20:59:31,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 20:59:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-03-20 20:59:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 20:59:31,061 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:31,062 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:31,080 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 20:59:31,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:31,275 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 3 times [2022-03-20 20:59:31,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359502852] [2022-03-20 20:59:31,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 4 times [2022-03-20 20:59:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:31,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345223894] [2022-03-20 20:59:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:31,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:31,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:31,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405685764] [2022-03-20 20:59:31,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:31,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:31,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:31,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 20:59:31,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:31,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:31,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:59:31,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 20:59:31,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:59:31,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:31,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345223894] [2022-03-20 20:59:31,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:31,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405685764] [2022-03-20 20:59:31,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405685764] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:31,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:31,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:31,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:31,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359502852] [2022-03-20 20:59:31,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359502852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:31,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:31,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:31,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656838701] [2022-03-20 20:59:31,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:31,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:59:31,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:59:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:59:31,375 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 20:59:31,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:31,424 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2022-03-20 20:59:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:59:31,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-20 20:59:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:31,426 INFO L225 Difference]: With dead ends: 170 [2022-03-20 20:59:31,426 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 20:59:31,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:59:31,429 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:31,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:59:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 20:59:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-03-20 20:59:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 20:59:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-03-20 20:59:31,441 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 47 [2022-03-20 20:59:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:31,441 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-03-20 20:59:31,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 20:59:31,441 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-03-20 20:59:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 20:59:31,442 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:31,442 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:31,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:31,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:31,648 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:31,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-20 20:59:31,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:31,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2311377] [2022-03-20 20:59:31,649 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 2 times [2022-03-20 20:59:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:31,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428782587] [2022-03-20 20:59:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:31,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:31,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:31,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703362277] [2022-03-20 20:59:31,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:31,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:31,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:31,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 20:59:31,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:31,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:59:31,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 20:59:31,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:59:31,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428782587] [2022-03-20 20:59:31,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703362277] [2022-03-20 20:59:31,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703362277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:31,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:31,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:31,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:31,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2311377] [2022-03-20 20:59:31,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2311377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:31,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:31,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:31,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284382680] [2022-03-20 20:59:31,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:31,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:59:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:59:31,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:59:31,771 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:59:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:31,815 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2022-03-20 20:59:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:59:31,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-20 20:59:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:31,818 INFO L225 Difference]: With dead ends: 158 [2022-03-20 20:59:31,818 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 20:59:31,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:59:31,819 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:31,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:59:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 20:59:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2022-03-20 20:59:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 states have internal predecessors, (86), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 20:59:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2022-03-20 20:59:31,836 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 52 [2022-03-20 20:59:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:31,838 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2022-03-20 20:59:31,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:59:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2022-03-20 20:59:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 20:59:31,839 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:31,839 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:31,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:32,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:32,049 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-20 20:59:32,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:32,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1930843125] [2022-03-20 20:59:32,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 2 times [2022-03-20 20:59:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:32,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083676081] [2022-03-20 20:59:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:32,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:32,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:32,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919965199] [2022-03-20 20:59:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:32,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:32,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:32,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:32,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 20:59:32,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:32,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:32,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 20:59:32,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 20:59:32,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 20:59:33,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:33,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083676081] [2022-03-20 20:59:33,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:33,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919965199] [2022-03-20 20:59:33,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919965199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:33,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:33,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 20:59:33,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:33,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1930843125] [2022-03-20 20:59:33,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1930843125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:33,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:33,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:33,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251979777] [2022-03-20 20:59:33,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:33,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:33,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:33,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:33,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:59:33,077 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 20:59:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:33,424 INFO L93 Difference]: Finished difference Result 200 states and 283 transitions. [2022-03-20 20:59:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:59:33,424 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-03-20 20:59:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:33,426 INFO L225 Difference]: With dead ends: 200 [2022-03-20 20:59:33,426 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 20:59:33,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:59:33,427 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:33,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 423 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 20:59:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-03-20 20:59:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 110 states have internal predecessors, (119), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 20:59:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2022-03-20 20:59:33,450 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 64 [2022-03-20 20:59:33,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:33,450 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2022-03-20 20:59:33,450 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 20:59:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2022-03-20 20:59:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:59:33,451 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:33,451 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:33,467 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 20:59:33,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 20:59:33,663 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 3 times [2022-03-20 20:59:33,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:33,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [634860105] [2022-03-20 20:59:33,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 4 times [2022-03-20 20:59:33,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:33,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827248596] [2022-03-20 20:59:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:33,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:33,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:33,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243726906] [2022-03-20 20:59:33,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:33,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:33,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:33,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:33,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 20:59:33,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:33,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:33,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 20:59:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 20:59:33,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 20:59:33,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:33,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827248596] [2022-03-20 20:59:33,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:33,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243726906] [2022-03-20 20:59:33,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243726906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:33,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:33,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-20 20:59:33,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:33,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [634860105] [2022-03-20 20:59:33,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [634860105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:33,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:33,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:59:33,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694658743] [2022-03-20 20:59:33,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:33,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:59:33,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:59:33,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:59:33,912 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:34,155 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2022-03-20 20:59:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:59:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2022-03-20 20:59:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:34,157 INFO L225 Difference]: With dead ends: 288 [2022-03-20 20:59:34,157 INFO L226 Difference]: Without dead ends: 281 [2022-03-20 20:59:34,158 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:59:34,158 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 46 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:34,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-20 20:59:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2022-03-20 20:59:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.206896551724138) internal successors, (140), 122 states have internal predecessors, (140), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 20:59:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 296 transitions. [2022-03-20 20:59:34,184 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 296 transitions. Word has length 69 [2022-03-20 20:59:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:34,188 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 296 transitions. [2022-03-20 20:59:34,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 296 transitions. [2022-03-20 20:59:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 20:59:34,188 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:34,189 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:34,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:34,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 20:59:34,403 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-03-20 20:59:34,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:34,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1587278758] [2022-03-20 20:59:34,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 2 times [2022-03-20 20:59:34,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:34,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113019104] [2022-03-20 20:59:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:34,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:34,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:34,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509721275] [2022-03-20 20:59:34,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:34,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:34,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:34,412 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:34,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 20:59:34,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:34,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:34,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 20:59:34,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 20:59:34,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-20 20:59:34,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:34,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113019104] [2022-03-20 20:59:34,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:34,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509721275] [2022-03-20 20:59:34,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509721275] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:59:34,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:59:34,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 20:59:34,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:34,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1587278758] [2022-03-20 20:59:34,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1587278758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:34,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:34,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45029909] [2022-03-20 20:59:34,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:34,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:59:34,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:59:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:59:34,677 INFO L87 Difference]: Start difference. First operand 208 states and 296 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:34,724 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-03-20 20:59:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:59:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-03-20 20:59:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:34,726 INFO L225 Difference]: With dead ends: 214 [2022-03-20 20:59:34,726 INFO L226 Difference]: Without dead ends: 212 [2022-03-20 20:59:34,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:59:34,727 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:34,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:59:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-20 20:59:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-20 20:59:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 125 states have internal predecessors, (143), 79 states have call successors, (79), 14 states have call predecessors, (79), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 20:59:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 299 transitions. [2022-03-20 20:59:34,751 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 299 transitions. Word has length 74 [2022-03-20 20:59:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:34,752 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 299 transitions. [2022-03-20 20:59:34,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 299 transitions. [2022-03-20 20:59:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 20:59:34,752 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:34,752 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:34,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:34,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 20:59:34,969 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-03-20 20:59:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:34,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892609998] [2022-03-20 20:59:34,970 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:34,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 2 times [2022-03-20 20:59:34,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:34,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859849471] [2022-03-20 20:59:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:34,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:34,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:34,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830841620] [2022-03-20 20:59:34,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:34,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:34,977 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:34,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 20:59:35,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:35,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:35,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 20:59:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 20:59:35,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 20:59:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:35,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859849471] [2022-03-20 20:59:35,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:35,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830841620] [2022-03-20 20:59:35,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830841620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:35,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:35,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:59:35,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:35,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892609998] [2022-03-20 20:59:35,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892609998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:35,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:35,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:59:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291049908] [2022-03-20 20:59:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:35,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:59:35,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:59:35,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:59:35,233 INFO L87 Difference]: Start difference. First operand 212 states and 299 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:35,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:35,371 INFO L93 Difference]: Finished difference Result 226 states and 310 transitions. [2022-03-20 20:59:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:59:35,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-03-20 20:59:35,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:35,372 INFO L225 Difference]: With dead ends: 226 [2022-03-20 20:59:35,372 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 20:59:35,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:59:35,373 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:35,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 20:59:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-03-20 20:59:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 128 states have (on average 1.1875) internal successors, (152), 134 states have internal predecessors, (152), 79 states have call successors, (79), 17 states have call predecessors, (79), 16 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 20:59:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-03-20 20:59:35,411 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 72 [2022-03-20 20:59:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:35,411 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-03-20 20:59:35,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-03-20 20:59:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 20:59:35,412 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:35,412 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:35,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:35,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 20:59:35,627 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 3 times [2022-03-20 20:59:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:35,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [272411369] [2022-03-20 20:59:35,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 4 times [2022-03-20 20:59:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:35,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878024332] [2022-03-20 20:59:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:35,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:35,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:35,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682083068] [2022-03-20 20:59:35,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:35,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:35,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:35,639 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:35,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 20:59:35,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:35,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 20:59:35,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 20:59:35,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:59:35,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878024332] [2022-03-20 20:59:35,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682083068] [2022-03-20 20:59:35,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682083068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:35,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:35,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:35,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [272411369] [2022-03-20 20:59:35,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [272411369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:35,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:35,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:35,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648387834] [2022-03-20 20:59:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:35,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:59:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:59:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:59:35,765 INFO L87 Difference]: Start difference. First operand 224 states and 308 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 20:59:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:35,828 INFO L93 Difference]: Finished difference Result 367 states and 500 transitions. [2022-03-20 20:59:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:59:35,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-20 20:59:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:35,830 INFO L225 Difference]: With dead ends: 367 [2022-03-20 20:59:35,830 INFO L226 Difference]: Without dead ends: 230 [2022-03-20 20:59:35,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:59:35,831 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:35,831 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:59:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-20 20:59:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2022-03-20 20:59:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 127 states have internal predecessors, (149), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 20:59:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2022-03-20 20:59:35,862 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 77 [2022-03-20 20:59:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:35,862 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2022-03-20 20:59:35,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 20:59:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2022-03-20 20:59:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 20:59:35,863 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:35,863 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:35,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:36,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 20:59:36,080 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:36,080 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 5 times [2022-03-20 20:59:36,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:36,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1874789978] [2022-03-20 20:59:36,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:36,080 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 6 times [2022-03-20 20:59:36,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:36,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887003621] [2022-03-20 20:59:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:36,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:36,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:36,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601099205] [2022-03-20 20:59:36,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:36,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:36,091 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:36,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 20:59:36,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:59:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 20:59:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:36,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:37,196 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:37,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:37,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887003621] [2022-03-20 20:59:37,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:37,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601099205] [2022-03-20 20:59:37,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601099205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:37,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:37,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-03-20 20:59:37,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:37,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1874789978] [2022-03-20 20:59:37,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1874789978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:37,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:37,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:59:37,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488888180] [2022-03-20 20:59:37,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:37,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:59:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:59:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:37,253 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:59:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:37,727 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2022-03-20 20:59:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:59:37,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 77 [2022-03-20 20:59:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:37,729 INFO L225 Difference]: With dead ends: 285 [2022-03-20 20:59:37,729 INFO L226 Difference]: Without dead ends: 283 [2022-03-20 20:59:37,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-20 20:59:37,730 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 59 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:37,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 536 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:59:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-20 20:59:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 265. [2022-03-20 20:59:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 157 states have (on average 1.178343949044586) internal successors, (185), 158 states have internal predecessors, (185), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-20 20:59:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2022-03-20 20:59:37,768 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 77 [2022-03-20 20:59:37,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:37,768 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2022-03-20 20:59:37,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:59:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2022-03-20 20:59:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 20:59:37,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:37,770 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:37,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:37,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 20:59:37,987 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2022-03-20 20:59:37,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:37,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [379405605] [2022-03-20 20:59:37,987 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 2 times [2022-03-20 20:59:37,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:37,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643690544] [2022-03-20 20:59:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:37,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:37,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:37,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321905406] [2022-03-20 20:59:37,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:37,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:37,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:37,995 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:37,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 20:59:38,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:38,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:38,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 20:59:38,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 20:59:38,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 20:59:39,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:39,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643690544] [2022-03-20 20:59:39,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:39,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321905406] [2022-03-20 20:59:39,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321905406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:39,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:39,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-20 20:59:39,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [379405605] [2022-03-20 20:59:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [379405605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:39,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:39,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:59:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773860472] [2022-03-20 20:59:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:39,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:59:39,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:59:39,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:59:39,883 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 20:59:40,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:40,424 INFO L93 Difference]: Finished difference Result 348 states and 475 transitions. [2022-03-20 20:59:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:59:40,426 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), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-20 20:59:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:40,427 INFO L225 Difference]: With dead ends: 348 [2022-03-20 20:59:40,427 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 20:59:40,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-20 20:59:40,428 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:40,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 437 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:59:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 20:59:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 330. [2022-03-20 20:59:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 191 states have (on average 1.193717277486911) internal successors, (228), 192 states have internal predecessors, (228), 115 states have call successors, (115), 24 states have call predecessors, (115), 23 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-03-20 20:59:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 456 transitions. [2022-03-20 20:59:40,483 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 456 transitions. Word has length 86 [2022-03-20 20:59:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:40,483 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 456 transitions. [2022-03-20 20:59:40,484 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), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 20:59:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 456 transitions. [2022-03-20 20:59:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 20:59:40,484 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:40,484 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:40,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 20:59:40,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:40,699 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 3 times [2022-03-20 20:59:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:40,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [715300579] [2022-03-20 20:59:40,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 4 times [2022-03-20 20:59:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:40,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696466188] [2022-03-20 20:59:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:40,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:40,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903426793] [2022-03-20 20:59:40,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:40,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:40,709 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:40,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 20:59:40,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:40,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 20:59:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:41,538 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:41,543 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 20:59:54,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:55,260 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:55,263 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:59,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:59,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696466188] [2022-03-20 20:59:59,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:59,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903426793] [2022-03-20 20:59:59,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903426793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:59:59,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:59:59,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 20:59:59,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:59,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [715300579] [2022-03-20 20:59:59,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [715300579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:59,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:59,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 20:59:59,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232781639] [2022-03-20 20:59:59,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:59,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 20:59:59,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 20:59:59,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=594, Unknown=1, NotChecked=0, Total=702 [2022-03-20 20:59:59,878 INFO L87 Difference]: Start difference. First operand 330 states and 456 transitions. Second operand has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 21:00:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:00,860 INFO L93 Difference]: Finished difference Result 377 states and 518 transitions. [2022-03-20 21:00:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:00:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2022-03-20 21:00:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:00,862 INFO L225 Difference]: With dead ends: 377 [2022-03-20 21:00:00,862 INFO L226 Difference]: Without dead ends: 374 [2022-03-20 21:00:00,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=166, Invalid=889, Unknown=1, NotChecked=0, Total=1056 [2022-03-20 21:00:00,863 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 57 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:00,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 587 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 615 Invalid, 0 Unknown, 133 Unchecked, 0.5s Time] [2022-03-20 21:00:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-03-20 21:00:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 359. [2022-03-20 21:00:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 206 states have (on average 1.1990291262135921) internal successors, (247), 207 states have internal predecessors, (247), 127 states have call successors, (127), 26 states have call predecessors, (127), 25 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 21:00:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 499 transitions. [2022-03-20 21:00:00,922 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 499 transitions. Word has length 91 [2022-03-20 21:00:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:00,922 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 499 transitions. [2022-03-20 21:00:00,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 21:00:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 499 transitions. [2022-03-20 21:00:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 21:00:00,926 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:00,926 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:00,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 21:00:01,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 21:00:01,140 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1983923522, now seen corresponding path program 1 times [2022-03-20 21:00:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807677694] [2022-03-20 21:00:01,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1983923522, now seen corresponding path program 2 times [2022-03-20 21:00:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147046487] [2022-03-20 21:00:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:01,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:01,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:01,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664291181] [2022-03-20 21:00:01,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:00:01,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:01,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:01,148 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:01,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 21:00:01,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:00:01,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:01,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 21:00:01,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 64 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 21:00:01,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 80 proven. 19 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 21:00:05,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:05,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147046487] [2022-03-20 21:00:05,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:05,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664291181] [2022-03-20 21:00:05,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664291181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:05,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:05,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-20 21:00:05,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:05,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807677694] [2022-03-20 21:00:05,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807677694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:05,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:05,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:00:05,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218474202] [2022-03-20 21:00:05,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:05,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:00:05,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:00:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:00:05,728 INFO L87 Difference]: Start difference. First operand 359 states and 499 transitions. Second operand has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 21:00:06,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:06,736 INFO L93 Difference]: Finished difference Result 425 states and 583 transitions. [2022-03-20 21:00:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:00:06,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 99 [2022-03-20 21:00:06,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:06,738 INFO L225 Difference]: With dead ends: 425 [2022-03-20 21:00:06,738 INFO L226 Difference]: Without dead ends: 423 [2022-03-20 21:00:06,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:00:06,739 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 67 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:06,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 693 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 21:00:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-20 21:00:06,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 363. [2022-03-20 21:00:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 209 states have (on average 1.1961722488038278) internal successors, (250), 210 states have internal predecessors, (250), 127 states have call successors, (127), 27 states have call predecessors, (127), 26 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 21:00:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 502 transitions. [2022-03-20 21:00:06,801 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 502 transitions. Word has length 99 [2022-03-20 21:00:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:06,803 INFO L478 AbstractCegarLoop]: Abstraction has 363 states and 502 transitions. [2022-03-20 21:00:06,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 21:00:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 502 transitions. [2022-03-20 21:00:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 21:00:06,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:06,804 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:06,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:07,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 21:00:07,020 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:07,021 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 7 times [2022-03-20 21:00:07,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:07,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [248260768] [2022-03-20 21:00:07,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:07,021 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 8 times [2022-03-20 21:00:07,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:07,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928267619] [2022-03-20 21:00:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:07,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:07,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:07,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410959887] [2022-03-20 21:00:07,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:00:07,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:07,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:07,028 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:07,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 21:00:07,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:00:07,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 21:00:07,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:07,715 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 26 proven. 92 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 21:00:07,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 69 proven. 27 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-20 21:00:08,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928267619] [2022-03-20 21:00:08,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410959887] [2022-03-20 21:00:08,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410959887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:08,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:08,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-03-20 21:00:08,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:08,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [248260768] [2022-03-20 21:00:08,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [248260768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:08,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:08,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:00:08,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872857509] [2022-03-20 21:00:08,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:08,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:00:08,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:00:08,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:00:08,284 INFO L87 Difference]: Start difference. First operand 363 states and 502 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 21:00:09,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:09,369 INFO L93 Difference]: Finished difference Result 470 states and 646 transitions. [2022-03-20 21:00:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:00:09,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 102 [2022-03-20 21:00:09,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:09,371 INFO L225 Difference]: With dead ends: 470 [2022-03-20 21:00:09,371 INFO L226 Difference]: Without dead ends: 468 [2022-03-20 21:00:09,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:00:09,372 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 57 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:09,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 672 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 21:00:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-03-20 21:00:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 407. [2022-03-20 21:00:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 234 states have (on average 1.1965811965811965) internal successors, (280), 235 states have internal predecessors, (280), 143 states have call successors, (143), 30 states have call predecessors, (143), 29 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-03-20 21:00:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 564 transitions. [2022-03-20 21:00:09,452 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 564 transitions. Word has length 102 [2022-03-20 21:00:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:09,453 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 564 transitions. [2022-03-20 21:00:09,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 21:00:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 564 transitions. [2022-03-20 21:00:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 21:00:09,454 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:09,455 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:09,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 21:00:09,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 21:00:09,671 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 5 times [2022-03-20 21:00:09,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:09,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [997574344] [2022-03-20 21:00:09,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 6 times [2022-03-20 21:00:09,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:09,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302441774] [2022-03-20 21:00:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:09,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:09,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:09,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063771931] [2022-03-20 21:00:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:00:09,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:09,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:09,681 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:00:09,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 21:00:09,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 21:00:09,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 21:00:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:10,378 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 21:00:10,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:10,706 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:01:14,370 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:01:25,197 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:01:57,346 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:02:23,691 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:02:34,017 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:06,688 WARN L232 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 20 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-20 21:04:33,252 WARN L232 SmtUtils]: Spent 12.01s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:05:53,456 WARN L232 SmtUtils]: Spent 17.16s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:06:11,497 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~y~0_BEFORE_CALL_121 Int) (v_main_~s~0_BEFORE_CALL_108 Int) (v_main_~k~0_BEFORE_CALL_90 Int) (v_main_~q~0_BEFORE_CALL_96 Int) (v_main_~x~0_BEFORE_CALL_116 Int) (v_main_~r~0_BEFORE_CALL_95 Int) (v_main_~p~0_BEFORE_CALL_95 Int) (v_main_~d~0_BEFORE_CALL_84 Int) (v_main_~b~0_BEFORE_CALL_125 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_84 v_main_~b~0_BEFORE_CALL_125))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_125) 0) (= (+ (* v_main_~p~0_BEFORE_CALL_95 v_main_~x~0_BEFORE_CALL_116) v_main_~b~0_BEFORE_CALL_125 (* v_main_~r~0_BEFORE_CALL_95 v_main_~y~0_BEFORE_CALL_121)) (+ (* v_main_~q~0_BEFORE_CALL_96 v_main_~x~0_BEFORE_CALL_116 v_main_~k~0_BEFORE_CALL_90) (* v_main_~q~0_BEFORE_CALL_96 v_main_~x~0_BEFORE_CALL_116) (* v_main_~q~0_BEFORE_CALL_96 v_main_~d~0_BEFORE_CALL_84 v_main_~x~0_BEFORE_CALL_116) (* v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108) (* v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108 v_main_~k~0_BEFORE_CALL_90) (* v_main_~d~0_BEFORE_CALL_84 v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108))) (<= .cse0 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-20 21:06:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 74 proven. 34 refuted. 1 times theorem prover too weak. 224 trivial. 1 not checked. [2022-03-20 21:06:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:18,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302441774] [2022-03-20 21:06:18,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:18,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063771931] [2022-03-20 21:06:18,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063771931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:18,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:18,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2022-03-20 21:06:18,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [997574344] [2022-03-20 21:06:18,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [997574344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:18,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:18,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:06:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431998421] [2022-03-20 21:06:18,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:18,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:06:18,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:18,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:06:18,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=445, Unknown=26, NotChecked=44, Total=600 [2022-03-20 21:06:18,613 INFO L87 Difference]: Start difference. First operand 407 states and 564 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 21:06:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:36,556 INFO L93 Difference]: Finished difference Result 495 states and 680 transitions. [2022-03-20 21:06:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 21:06:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-03-20 21:06:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:36,559 INFO L225 Difference]: With dead ends: 495 [2022-03-20 21:06:36,559 INFO L226 Difference]: Without dead ends: 492 [2022-03-20 21:06:36,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 112.9s TimeCoverageRelationStatistics Valid=153, Invalid=751, Unknown=30, NotChecked=58, Total=992 [2022-03-20 21:06:36,560 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 46 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:36,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 473 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:06:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-20 21:06:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 409. [2022-03-20 21:06:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 238 states have (on average 1.1890756302521008) internal successors, (283), 239 states have internal predecessors, (283), 139 states have call successors, (139), 32 states have call predecessors, (139), 31 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-20 21:06:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 559 transitions. [2022-03-20 21:06:36,635 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 559 transitions. Word has length 108 [2022-03-20 21:06:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:36,636 INFO L478 AbstractCegarLoop]: Abstraction has 409 states and 559 transitions. [2022-03-20 21:06:36,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 21:06:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 559 transitions. [2022-03-20 21:06:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 21:06:36,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:36,637 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:36,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:36,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:36,854 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 9 times [2022-03-20 21:06:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:36,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222969240] [2022-03-20 21:06:36,855 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 10 times [2022-03-20 21:06:36,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:36,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798550909] [2022-03-20 21:06:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:36,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:36,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709264828] [2022-03-20 21:06:36,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:36,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:36,862 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:06:36,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 21:06:36,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:36,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 21:06:36,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 57 proven. 73 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-20 21:06:38,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 21:06:39,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:39,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798550909] [2022-03-20 21:06:39,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:39,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709264828] [2022-03-20 21:06:39,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709264828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:39,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:39,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 30 [2022-03-20 21:06:39,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:39,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222969240] [2022-03-20 21:06:39,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222969240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:39,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:39,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:06:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044329251] [2022-03-20 21:06:39,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:39,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:06:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:06:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:06:39,847 INFO L87 Difference]: Start difference. First operand 409 states and 559 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 21:06:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:41,274 INFO L93 Difference]: Finished difference Result 519 states and 707 transitions. [2022-03-20 21:06:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:06:41,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 107 [2022-03-20 21:06:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:41,276 INFO L225 Difference]: With dead ends: 519 [2022-03-20 21:06:41,277 INFO L226 Difference]: Without dead ends: 517 [2022-03-20 21:06:41,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:06:41,277 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 85 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:41,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 759 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 21:06:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-20 21:06:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 495. [2022-03-20 21:06:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 288 states have (on average 1.1909722222222223) internal successors, (343), 289 states have internal predecessors, (343), 171 states have call successors, (171), 36 states have call predecessors, (171), 35 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-20 21:06:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 683 transitions. [2022-03-20 21:06:41,379 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 683 transitions. Word has length 107 [2022-03-20 21:06:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:41,379 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 683 transitions. [2022-03-20 21:06:41,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 21:06:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 683 transitions. [2022-03-20 21:06:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 21:06:41,380 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:41,380 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:41,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:41,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:41,595 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 7 times [2022-03-20 21:06:41,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:41,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1234854246] [2022-03-20 21:06:41,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 8 times [2022-03-20 21:06:41,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:41,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220731378] [2022-03-20 21:06:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:41,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:41,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822361390] [2022-03-20 21:06:41,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:41,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:41,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:41,603 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:06:41,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 21:06:41,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:41,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:41,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 21:06:41,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:42,503 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 21:06:44,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:45,297 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:45,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:45,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220731378] [2022-03-20 21:06:45,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:45,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822361390] [2022-03-20 21:06:45,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822361390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:06:45,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:06:45,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 21:06:45,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:45,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1234854246] [2022-03-20 21:06:45,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1234854246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:45,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:45,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:06:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288279667] [2022-03-20 21:06:45,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:45,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:06:45,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:06:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:06:45,796 INFO L87 Difference]: Start difference. First operand 495 states and 683 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:06:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:47,031 INFO L93 Difference]: Finished difference Result 584 states and 806 transitions. [2022-03-20 21:06:47,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:06:47,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-03-20 21:06:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:47,034 INFO L225 Difference]: With dead ends: 584 [2022-03-20 21:06:47,034 INFO L226 Difference]: Without dead ends: 581 [2022-03-20 21:06:47,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:06:47,035 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 48 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:47,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 603 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 21:06:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-20 21:06:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 527. [2022-03-20 21:06:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 306 states have (on average 1.1928104575163399) internal successors, (365), 307 states have internal predecessors, (365), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-20 21:06:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 729 transitions. [2022-03-20 21:06:47,140 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 729 transitions. Word has length 111 [2022-03-20 21:06:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:47,140 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 729 transitions. [2022-03-20 21:06:47,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:06:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 729 transitions. [2022-03-20 21:06:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 21:06:47,148 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:47,148 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:47,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:47,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 21:06:47,361 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 9 times [2022-03-20 21:06:47,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:47,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078097853] [2022-03-20 21:06:47,362 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:47,362 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 10 times [2022-03-20 21:06:47,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:47,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184478265] [2022-03-20 21:06:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:47,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:47,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:47,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867790904] [2022-03-20 21:06:47,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:47,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:47,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:47,372 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:06:47,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 21:06:47,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:47,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 21:06:47,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:48,377 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:48,379 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:48,380 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:12,348 WARN L232 SmtUtils]: Spent 21.86s on a formula simplification. DAG size of input: 78 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:07:20,609 WARN L833 $PredicateComparison]: unable to prove that (and (or (let ((.cse0 (div c_main_~a~0 c_main_~a~0))) (and (= (+ (* (* .cse0 c_main_~r~0) 4) c_main_~s~0) 1) (= (* (* .cse0 c_main_~a~0) 4) c_main_~y~0) (= 0 (+ c_main_~q~0 (* (* .cse0 c_main_~p~0) 4))))) (let ((.cse1 (div (div (* (- 1) c_main_~q~0) 4) c_main_~p~0))) (and (= (+ c_main_~s~0 (* 4 (* .cse1 c_main_~r~0))) 1) (= c_main_~y~0 (* (* .cse1 c_main_~a~0) 4)) (= (mod (* c_main_~q~0 3) 4) 0) (not (= c_main_~p~0 0)) (= c_main_~a~0 0) (= (mod (div (- c_main_~q~0) 4) c_main_~p~0) 0)))) (= c_main_~x~0 c_main_~a~0) (= c_main_~r~0 0) (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) is different from false [2022-03-20 21:07:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 21:07:24,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:39,526 WARN L855 $PredicateComparison]: unable to prove that (or (not (= c_main_~v~0 (* c_main_~b~0 c_main_~d~0))) (not (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) (= (let ((.cse0 (+ (* 2 c_main_~d~0) c_main_~k~0))) (+ (* (+ (* (- 1) c_main_~q~0 .cse0) c_main_~p~0) c_main_~x~0) c_main_~b~0 (* (+ (* (* c_main_~s~0 .cse0) (- 1)) c_main_~r~0) c_main_~y~0))) (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0))) (not (= (+ (* (- 2) c_main_~v~0) c_main_~c~0) 0))) is different from true [2022-03-20 21:07:39,648 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:39,649 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:40,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184478265] [2022-03-20 21:07:40,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867790904] [2022-03-20 21:07:40,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867790904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:07:40,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:07:40,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 21:07:40,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:40,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078097853] [2022-03-20 21:07:40,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078097853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:40,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:40,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:07:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083830191] [2022-03-20 21:07:40,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:40,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:07:40,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:07:40,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=546, Unknown=9, NotChecked=98, Total=756 [2022-03-20 21:07:40,422 INFO L87 Difference]: Start difference. First operand 527 states and 729 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:07:43,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:07:45,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:07:47,899 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse9 (div (div (* (- 1) c_main_~q~0) 4) c_main_~p~0)) (.cse10 (div c_main_~a~0 c_main_~a~0))) (let ((.cse0 (= (+ (* (* .cse10 c_main_~r~0) 4) c_main_~s~0) 1)) (.cse1 (* (* .cse10 c_main_~a~0) 4)) (.cse2 (= 0 (+ c_main_~q~0 (* (* .cse10 c_main_~p~0) 4)))) (.cse3 (= (+ c_main_~s~0 (* 4 (* .cse9 c_main_~r~0))) 1)) (.cse4 (* (* .cse9 c_main_~a~0) 4)) (.cse5 (= (mod (* c_main_~q~0 3) 4) 0)) (.cse6 (not (= c_main_~p~0 0))) (.cse7 (= c_main_~a~0 0)) (.cse8 (= (mod (div (- c_main_~q~0) 4) c_main_~p~0) 0))) (and (or (and .cse0 (= .cse1 c_main_~y~0) .cse2) (and .cse3 (= c_main_~y~0 .cse4) .cse5 .cse6 .cse7 .cse8)) (= c_main_~x~0 c_main_~a~0) (= c_main_~r~0 0) (or (and .cse0 (= (+ c_main_~b~0 .cse1) c_main_~y~0) .cse2) (and .cse3 (= (+ c_main_~b~0 .cse4) c_main_~y~0) .cse5 .cse6 .cse7 .cse8)) (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)))) is different from false [2022-03-20 21:07:49,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:07:51,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:07:53,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:07:55,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:07:57,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:07:59,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:08:00,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:08:02,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:08:04,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:08:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:05,112 INFO L93 Difference]: Finished difference Result 587 states and 804 transitions. [2022-03-20 21:08:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:08:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 113 [2022-03-20 21:08:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:05,115 INFO L225 Difference]: With dead ends: 587 [2022-03-20 21:08:05,115 INFO L226 Difference]: Without dead ends: 584 [2022-03-20 21:08:05,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=131, Invalid=741, Unknown=10, NotChecked=174, Total=1056 [2022-03-20 21:08:05,117 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 61 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 69 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:05,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 662 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 828 Invalid, 9 Unknown, 104 Unchecked, 22.4s Time] [2022-03-20 21:08:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-20 21:08:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 572. [2022-03-20 21:08:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 333 states have (on average 1.1891891891891893) internal successors, (396), 335 states have internal predecessors, (396), 197 states have call successors, (197), 42 states have call predecessors, (197), 41 states have return successors, (195), 194 states have call predecessors, (195), 195 states have call successors, (195) [2022-03-20 21:08:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 788 transitions. [2022-03-20 21:08:05,247 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 788 transitions. Word has length 113 [2022-03-20 21:08:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:05,247 INFO L478 AbstractCegarLoop]: Abstraction has 572 states and 788 transitions. [2022-03-20 21:08:05,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:08:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 788 transitions. [2022-03-20 21:08:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 21:08:05,248 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:05,248 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:05,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:05,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 21:08:05,455 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 11 times [2022-03-20 21:08:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:05,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1559140927] [2022-03-20 21:08:05,456 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 12 times [2022-03-20 21:08:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:05,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425112180] [2022-03-20 21:08:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:05,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:05,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646683569] [2022-03-20 21:08:05,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:05,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:05,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:05,463 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:05,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 21:08:05,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:08:05,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 21:08:05,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 21:08:06,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 21:08:09,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:09,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425112180] [2022-03-20 21:08:09,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:09,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646683569] [2022-03-20 21:08:09,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646683569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:09,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:09,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2022-03-20 21:08:09,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:09,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1559140927] [2022-03-20 21:08:09,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1559140927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:09,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:09,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:08:09,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316383831] [2022-03-20 21:08:09,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:09,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:08:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:08:09,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:08:09,095 INFO L87 Difference]: Start difference. First operand 572 states and 788 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 21:08:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:10,242 INFO L93 Difference]: Finished difference Result 641 states and 876 transitions. [2022-03-20 21:08:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:08:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 116 [2022-03-20 21:08:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:10,245 INFO L225 Difference]: With dead ends: 641 [2022-03-20 21:08:10,245 INFO L226 Difference]: Without dead ends: 638 [2022-03-20 21:08:10,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 21:08:10,245 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 79 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:10,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 720 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 21:08:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-20 21:08:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 576. [2022-03-20 21:08:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 336 states have (on average 1.1875) internal successors, (399), 338 states have internal predecessors, (399), 197 states have call successors, (197), 43 states have call predecessors, (197), 42 states have return successors, (195), 194 states have call predecessors, (195), 195 states have call successors, (195) [2022-03-20 21:08:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 791 transitions. [2022-03-20 21:08:10,373 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 791 transitions. Word has length 116 [2022-03-20 21:08:10,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:10,373 INFO L478 AbstractCegarLoop]: Abstraction has 576 states and 791 transitions. [2022-03-20 21:08:10,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 21:08:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 791 transitions. [2022-03-20 21:08:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 21:08:10,375 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:10,375 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:10,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:10,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:10,581 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:10,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:10,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 13 times [2022-03-20 21:08:10,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:10,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617955375] [2022-03-20 21:08:10,582 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:10,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 14 times [2022-03-20 21:08:10,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:10,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235110712] [2022-03-20 21:08:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:10,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:10,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:10,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993213238] [2022-03-20 21:08:10,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:10,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:10,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:10,589 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:10,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 21:08:10,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:10,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 21:08:10,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 21:08:12,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:13,719 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:08:13,721 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:08:18,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:18,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235110712] [2022-03-20 21:08:18,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:18,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993213238] [2022-03-20 21:08:18,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993213238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:08:18,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:08:18,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 21:08:18,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:18,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617955375] [2022-03-20 21:08:18,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617955375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:18,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:18,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:08:18,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304447095] [2022-03-20 21:08:18,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:18,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:08:18,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:08:18,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=702, Unknown=1, NotChecked=0, Total=812 [2022-03-20 21:08:18,131 INFO L87 Difference]: Start difference. First operand 576 states and 791 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:08:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:21,764 INFO L93 Difference]: Finished difference Result 667 states and 917 transitions. [2022-03-20 21:08:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 21:08:21,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-03-20 21:08:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:21,768 INFO L225 Difference]: With dead ends: 667 [2022-03-20 21:08:21,768 INFO L226 Difference]: Without dead ends: 664 [2022-03-20 21:08:21,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=189, Invalid=1216, Unknown=1, NotChecked=0, Total=1406 [2022-03-20 21:08:21,769 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:21,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 889 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 21:08:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-20 21:08:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 641. [2022-03-20 21:08:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 370 states have (on average 1.1945945945945946) internal successors, (442), 372 states have internal predecessors, (442), 225 states have call successors, (225), 46 states have call predecessors, (225), 45 states have return successors, (223), 222 states have call predecessors, (223), 223 states have call successors, (223) [2022-03-20 21:08:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 890 transitions. [2022-03-20 21:08:21,912 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 890 transitions. Word has length 116 [2022-03-20 21:08:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:21,912 INFO L478 AbstractCegarLoop]: Abstraction has 641 states and 890 transitions. [2022-03-20 21:08:21,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:08:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 890 transitions. [2022-03-20 21:08:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 21:08:21,914 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:21,914 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:21,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:22,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:22,131 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:22,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:22,132 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 15 times [2022-03-20 21:08:22,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:22,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [982187343] [2022-03-20 21:08:22,132 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:22,132 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 16 times [2022-03-20 21:08:22,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:22,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733674999] [2022-03-20 21:08:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:22,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:22,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:22,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388470222] [2022-03-20 21:08:22,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:22,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:22,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:22,143 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 21:08:22,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:22,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 118 conjunts are in the unsatisfiable core [2022-03-20 21:08:22,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 113 proven. 70 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 21:08:24,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 21:08:26,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733674999] [2022-03-20 21:08:26,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388470222] [2022-03-20 21:08:26,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388470222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:26,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:26,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 35 [2022-03-20 21:08:26,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [982187343] [2022-03-20 21:08:26,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [982187343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:26,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:26,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 21:08:26,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734784936] [2022-03-20 21:08:26,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:26,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 21:08:26,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 21:08:26,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:08:26,018 INFO L87 Difference]: Start difference. First operand 641 states and 890 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:08:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:27,998 INFO L93 Difference]: Finished difference Result 749 states and 1030 transitions. [2022-03-20 21:08:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:08:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 121 [2022-03-20 21:08:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:28,002 INFO L225 Difference]: With dead ends: 749 [2022-03-20 21:08:28,002 INFO L226 Difference]: Without dead ends: 746 [2022-03-20 21:08:28,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:08:28,003 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 123 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:28,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 563 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 21:08:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-20 21:08:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 675. [2022-03-20 21:08:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 388 states have (on average 1.1958762886597938) internal successors, (464), 390 states have internal predecessors, (464), 237 states have call successors, (237), 50 states have call predecessors, (237), 49 states have return successors, (235), 234 states have call predecessors, (235), 235 states have call successors, (235) [2022-03-20 21:08:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 936 transitions. [2022-03-20 21:08:28,167 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 936 transitions. Word has length 121 [2022-03-20 21:08:28,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:28,167 INFO L478 AbstractCegarLoop]: Abstraction has 675 states and 936 transitions. [2022-03-20 21:08:28,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:08:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 936 transitions. [2022-03-20 21:08:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 21:08:28,169 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:28,170 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:28,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:28,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 21:08:28,383 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 3 times [2022-03-20 21:08:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:28,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2144678112] [2022-03-20 21:08:28,384 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 4 times [2022-03-20 21:08:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:28,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644901658] [2022-03-20 21:08:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:28,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:28,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:28,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738179126] [2022-03-20 21:08:28,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:28,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:28,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:28,391 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:28,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 21:08:28,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:28,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 21:08:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:29,421 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:08:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 76 proven. 113 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-20 21:08:29,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 110 proven. 27 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-20 21:08:30,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:30,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644901658] [2022-03-20 21:08:30,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:30,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738179126] [2022-03-20 21:08:30,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738179126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:30,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:30,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 29 [2022-03-20 21:08:30,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:30,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2144678112] [2022-03-20 21:08:30,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2144678112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:30,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:30,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:08:30,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297965101] [2022-03-20 21:08:30,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:30,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:08:30,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:30,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:08:30,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:08:30,698 INFO L87 Difference]: Start difference. First operand 675 states and 936 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 21:08:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:32,038 INFO L93 Difference]: Finished difference Result 794 states and 1090 transitions. [2022-03-20 21:08:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:08:32,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) Word has length 124 [2022-03-20 21:08:32,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:32,042 INFO L225 Difference]: With dead ends: 794 [2022-03-20 21:08:32,042 INFO L226 Difference]: Without dead ends: 792 [2022-03-20 21:08:32,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:08:32,043 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 63 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:32,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 906 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 21:08:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-03-20 21:08:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 727. [2022-03-20 21:08:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 419 states have (on average 1.1933174224343674) internal successors, (500), 421 states have internal predecessors, (500), 253 states have call successors, (253), 55 states have call predecessors, (253), 54 states have return successors, (251), 250 states have call predecessors, (251), 251 states have call successors, (251) [2022-03-20 21:08:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1004 transitions. [2022-03-20 21:08:32,212 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1004 transitions. Word has length 124 [2022-03-20 21:08:32,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:32,212 INFO L478 AbstractCegarLoop]: Abstraction has 727 states and 1004 transitions. [2022-03-20 21:08:32,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 21:08:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1004 transitions. [2022-03-20 21:08:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 21:08:32,213 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:32,213 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:32,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:32,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 21:08:32,425 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:32,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:32,425 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 5 times [2022-03-20 21:08:32,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:32,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220132876] [2022-03-20 21:08:32,425 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:32,425 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 6 times [2022-03-20 21:08:32,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:32,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907245128] [2022-03-20 21:08:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:32,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:32,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:32,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935766730] [2022-03-20 21:08:32,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:32,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:32,432 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:32,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 21:08:32,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 21:08:32,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:32,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 21:08:32,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 95 proven. 62 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-03-20 21:08:32,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:38,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907245128] [2022-03-20 21:08:38,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935766730] [2022-03-20 21:08:38,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935766730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:08:38,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:08:38,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 21:08:38,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220132876] [2022-03-20 21:08:38,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220132876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:38,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:38,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 21:08:38,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869035023] [2022-03-20 21:08:38,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:38,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 21:08:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 21:08:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:08:38,146 INFO L87 Difference]: Start difference. First operand 727 states and 1004 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 21:08:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:38,728 INFO L93 Difference]: Finished difference Result 767 states and 1045 transitions. [2022-03-20 21:08:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 21:08:38,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 129 [2022-03-20 21:08:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:38,731 INFO L225 Difference]: With dead ends: 767 [2022-03-20 21:08:38,732 INFO L226 Difference]: Without dead ends: 765 [2022-03-20 21:08:38,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:08:38,732 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:38,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 292 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:08:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-03-20 21:08:38,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 740. [2022-03-20 21:08:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 428 states have (on average 1.189252336448598) internal successors, (509), 431 states have internal predecessors, (509), 255 states have call successors, (255), 57 states have call predecessors, (255), 56 states have return successors, (253), 251 states have call predecessors, (253), 253 states have call successors, (253) [2022-03-20 21:08:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1017 transitions. [2022-03-20 21:08:38,909 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1017 transitions. Word has length 129 [2022-03-20 21:08:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:38,909 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 1017 transitions. [2022-03-20 21:08:38,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 21:08:38,909 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1017 transitions. [2022-03-20 21:08:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 21:08:38,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:38,911 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:38,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 21:08:39,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 21:08:39,111 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 17 times [2022-03-20 21:08:39,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:39,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474506251] [2022-03-20 21:08:39,112 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 18 times [2022-03-20 21:08:39,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:39,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614746128] [2022-03-20 21:08:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:39,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:39,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629877845] [2022-03-20 21:08:39,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:39,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:39,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:39,118 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:39,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 21:08:39,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:08:39,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:39,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 21:08:39,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-03-20 21:08:39,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 21:08:39,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:39,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614746128] [2022-03-20 21:08:39,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:39,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629877845] [2022-03-20 21:08:39,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629877845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:39,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:39,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 21:08:39,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:39,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474506251] [2022-03-20 21:08:39,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474506251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:39,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:39,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 21:08:39,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508819630] [2022-03-20 21:08:39,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:39,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 21:08:39,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:39,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 21:08:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 21:08:39,569 INFO L87 Difference]: Start difference. First operand 740 states and 1017 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-20 21:08:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:39,949 INFO L93 Difference]: Finished difference Result 1277 states and 1827 transitions. [2022-03-20 21:08:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:08:39,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 133 [2022-03-20 21:08:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:39,954 INFO L225 Difference]: With dead ends: 1277 [2022-03-20 21:08:39,954 INFO L226 Difference]: Without dead ends: 946 [2022-03-20 21:08:39,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:08:39,955 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:39,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 248 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:39,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-20 21:08:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 831. [2022-03-20 21:08:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 466 states have (on average 1.206008583690987) internal successors, (562), 481 states have internal predecessors, (562), 312 states have call successors, (312), 53 states have call predecessors, (312), 52 states have return successors, (310), 296 states have call predecessors, (310), 310 states have call successors, (310) [2022-03-20 21:08:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1184 transitions. [2022-03-20 21:08:40,203 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1184 transitions. Word has length 133 [2022-03-20 21:08:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:40,203 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1184 transitions. [2022-03-20 21:08:40,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-20 21:08:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1184 transitions. [2022-03-20 21:08:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 21:08:40,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:40,205 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:40,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:40,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 21:08:40,405 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 19 times [2022-03-20 21:08:40,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:40,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [555307653] [2022-03-20 21:08:40,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 20 times [2022-03-20 21:08:40,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:40,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380230864] [2022-03-20 21:08:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:40,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:40,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996093308] [2022-03-20 21:08:40,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:40,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:40,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:40,414 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:40,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 21:08:40,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:40,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 21:08:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 133 proven. 88 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 21:08:41,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 134 proven. 60 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 21:08:43,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:43,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380230864] [2022-03-20 21:08:43,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:43,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996093308] [2022-03-20 21:08:43,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996093308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:43,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:43,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-20 21:08:43,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [555307653] [2022-03-20 21:08:43,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [555307653] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:43,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:43,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:08:43,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472674547] [2022-03-20 21:08:43,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:43,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:08:43,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:08:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-03-20 21:08:43,524 INFO L87 Difference]: Start difference. First operand 831 states and 1184 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:08:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:44,509 INFO L93 Difference]: Finished difference Result 962 states and 1372 transitions. [2022-03-20 21:08:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:08:44,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-03-20 21:08:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:44,514 INFO L225 Difference]: With dead ends: 962 [2022-03-20 21:08:44,514 INFO L226 Difference]: Without dead ends: 959 [2022-03-20 21:08:44,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:08:44,514 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:44,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 508 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:08:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-20 21:08:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 870. [2022-03-20 21:08:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 486 states have (on average 1.2078189300411524) internal successors, (587), 501 states have internal predecessors, (587), 328 states have call successors, (328), 56 states have call predecessors, (328), 55 states have return successors, (326), 312 states have call predecessors, (326), 326 states have call successors, (326) [2022-03-20 21:08:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1241 transitions. [2022-03-20 21:08:44,748 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1241 transitions. Word has length 133 [2022-03-20 21:08:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:44,748 INFO L478 AbstractCegarLoop]: Abstraction has 870 states and 1241 transitions. [2022-03-20 21:08:44,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:08:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1241 transitions. [2022-03-20 21:08:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 21:08:44,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:44,750 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:44,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:44,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 21:08:44,951 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 21 times [2022-03-20 21:08:44,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:44,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201976846] [2022-03-20 21:08:44,951 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 22 times [2022-03-20 21:08:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:44,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761765988] [2022-03-20 21:08:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:44,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:44,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147019319] [2022-03-20 21:08:44,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:44,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:44,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:44,958 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:44,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 21:08:45,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:45,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:45,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 21:08:45,012 INFO L286 TraceCheckSpWp]: Computing forward predicates...