/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:31:47,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:31:47,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:31:47,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:31:47,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 00:31:47,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 00:31:47,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 00:31:47,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 00:31:47,462 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:31:47,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:31:47,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:31:47,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:31:47,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:31:47,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:31:47,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:31:47,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:31:47,467 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:31:47,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:31:47,468 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:31:47,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:31:47,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:31:47,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:31:47,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:31:47,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:31:47,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:31:47,469 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:31:47,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:31:47,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:31:47,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:31:47,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:31:47,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:31:47,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:31:47,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:31:47,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:31:47,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:31:47,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:31:47,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:31:47,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:31:47,470 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:31:47,471 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:31:47,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:31:47,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:31:47,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:31:47,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:31:47,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:31:47,667 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:31:47,669 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:31:47,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-03-20 00:31:47,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4aaaf98/6d7f3462abd74ed5aeee2e2e2c2214ee/FLAGfa0f829fc [2022-03-20 00:31:48,103 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:31:48,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-03-20 00:31:48,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4aaaf98/6d7f3462abd74ed5aeee2e2e2c2214ee/FLAGfa0f829fc [2022-03-20 00:31:48,533 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4aaaf98/6d7f3462abd74ed5aeee2e2e2c2214ee [2022-03-20 00:31:48,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:31:48,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:31:48,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:31:48,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:31:48,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:31:48,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dbc16ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48, skipping insertion in model container [2022-03-20 00:31:48,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:31:48,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:31:48,749 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/egcd2-ll_unwindbound100.c[490,503] [2022-03-20 00:31:48,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:31:48,785 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:31:48,793 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/egcd2-ll_unwindbound100.c[490,503] [2022-03-20 00:31:48,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:31:48,809 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:31:48,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48 WrapperNode [2022-03-20 00:31:48,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:31:48,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:31:48,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:31:48,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:31:48,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:31:48,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:31:48,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:31:48,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:31:48,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48" (1/1) ... [2022-03-20 00:31:48,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:31:48,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:48,889 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 00:31:48,922 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 00:31:48,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:31:48,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:31:48,952 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:31:48,953 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:31:48,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:31:48,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:31:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:31:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:31:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:31:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:31:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 00:31:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:31:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:31:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:31:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:31:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:31:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:31:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:31:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:31:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:31:49,004 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:31:49,005 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:31:49,138 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:31:49,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:31:49,143 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 00:31:49,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:31:49 BoogieIcfgContainer [2022-03-20 00:31:49,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:31:49,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:31:49,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:31:49,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:31:49,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:31:48" (1/3) ... [2022-03-20 00:31:49,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b959e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:31:49, skipping insertion in model container [2022-03-20 00:31:49,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:31:48" (2/3) ... [2022-03-20 00:31:49,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b959e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:31:49, skipping insertion in model container [2022-03-20 00:31:49,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:31:49" (3/3) ... [2022-03-20 00:31:49,154 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2022-03-20 00:31:49,157 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:31:49,158 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:31:49,206 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:31:49,212 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 00:31:49,212 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:31:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 00:31:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 00:31:49,230 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:49,231 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] [2022-03-20 00:31:49,231 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:49,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2022-03-20 00:31:49,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:49,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405710105] [2022-03-20 00:31:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:49,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:49,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:31:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:49,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:31:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:49,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 00:31:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:49,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:31:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:49,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 00:31:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:49,443 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 00:31:49,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405710105] [2022-03-20 00:31:49,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405710105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:31:49,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:31:49,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:31:49,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691381335] [2022-03-20 00:31:49,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:31:49,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:31:49,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:49,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:31:49,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:31:49,482 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 00:31:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:49,591 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2022-03-20 00:31:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:31:49,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 32 [2022-03-20 00:31:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:49,599 INFO L225 Difference]: With dead ends: 72 [2022-03-20 00:31:49,600 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 00:31:49,603 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 00:31:49,608 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:49,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:31:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 00:31:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 00:31:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:31:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-03-20 00:31:49,646 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-03-20 00:31:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:49,647 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-03-20 00:31:49,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 00:31:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-03-20 00:31:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 00:31:49,649 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:49,649 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 00:31:49,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:31:49,650 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2022-03-20 00:31:49,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:49,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750592371] [2022-03-20 00:31:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:49,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:49,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:49,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869678151] [2022-03-20 00:31:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:49,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:49,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:49,667 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 00:31:49,683 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 00:31:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:49,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:31:49,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:49,843 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 00:31:49,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:31:49,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:49,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750592371] [2022-03-20 00:31:49,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:49,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869678151] [2022-03-20 00:31:49,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869678151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:31:49,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:31:49,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 00:31:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062625784] [2022-03-20 00:31:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:31:49,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 00:31:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 00:31:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 00:31:49,847 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:31:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:49,864 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-03-20 00:31:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 00:31:49,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 00:31:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:49,865 INFO L225 Difference]: With dead ends: 44 [2022-03-20 00:31:49,865 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 00:31:49,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 00:31:49,867 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:49,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:31:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 00:31:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 00:31:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:31:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-03-20 00:31:49,873 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-03-20 00:31:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:49,874 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-03-20 00:31:49,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:31:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-03-20 00:31:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 00:31:49,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:49,875 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 00:31:49,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 00:31:50,095 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 00:31:50,096 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2022-03-20 00:31:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:50,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750422369] [2022-03-20 00:31:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:50,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:50,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:50,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280920018] [2022-03-20 00:31:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:50,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:50,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:50,115 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 00:31:50,118 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 00:31:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:50,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:31:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:31:50,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:31:50,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750422369] [2022-03-20 00:31:50,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:50,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280920018] [2022-03-20 00:31:50,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280920018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:31:50,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:31:50,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 00:31:50,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200007805] [2022-03-20 00:31:50,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:31:50,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 00:31:50,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:50,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 00:31:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 00:31:50,369 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:31:50,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:50,433 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-03-20 00:31:50,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:31:50,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-20 00:31:50,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:50,434 INFO L225 Difference]: With dead ends: 53 [2022-03-20 00:31:50,434 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 00:31:50,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:31:50,435 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:50,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 160 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:31:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 00:31:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-03-20 00:31:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:31:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-20 00:31:50,442 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-03-20 00:31:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:50,442 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-20 00:31:50,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:31:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-20 00:31:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 00:31:50,443 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:50,443 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, 1, 1] [2022-03-20 00:31:50,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 00:31:50,677 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 00:31:50,677 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:50,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2022-03-20 00:31:50,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:50,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292334413] [2022-03-20 00:31:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:50,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:50,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:50,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150253251] [2022-03-20 00:31:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:50,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:50,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:50,700 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 00:31:50,719 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 00:31:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 00:31:50,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:31:50,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:50,955 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 00:31:50,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292334413] [2022-03-20 00:31:50,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150253251] [2022-03-20 00:31:50,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150253251] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:31:50,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:31:50,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 00:31:50,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962132021] [2022-03-20 00:31:50,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:31:50,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:31:50,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:50,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:31:50,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:31:50,957 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 00:31:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:50,986 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-03-20 00:31:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:31:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 36 [2022-03-20 00:31:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:50,987 INFO L225 Difference]: With dead ends: 43 [2022-03-20 00:31:50,987 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 00:31:50,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 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 00:31:50,988 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:50,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:31:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 00:31:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 00:31:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:31:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-20 00:31:50,994 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 36 [2022-03-20 00:31:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:50,994 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-20 00:31:50,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 00:31:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-20 00:31:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 00:31:50,995 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:50,995 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 00:31:51,015 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 00:31:51,215 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 00:31:51,215 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2022-03-20 00:31:51,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:51,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417102426] [2022-03-20 00:31:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:51,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:51,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:51,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858072863] [2022-03-20 00:31:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:51,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:51,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:51,226 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 00:31:51,227 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 00:31:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:31:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:31:51,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:31:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417102426] [2022-03-20 00:31:51,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858072863] [2022-03-20 00:31:51,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858072863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:31:51,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:31:51,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:31:51,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463254839] [2022-03-20 00:31:51,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:31:51,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:31:51,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:31:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:31:51,330 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:31:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:51,351 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-20 00:31:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:31:51,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 00:31:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:51,352 INFO L225 Difference]: With dead ends: 66 [2022-03-20 00:31:51,352 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 00:31:51,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:31:51,353 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:51,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:31:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 00:31:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 00:31:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:31:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-03-20 00:31:51,359 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2022-03-20 00:31:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:51,359 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-03-20 00:31:51,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:31:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-03-20 00:31:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 00:31:51,360 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:51,360 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, 1, 1] [2022-03-20 00:31:51,392 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 00:31:51,578 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 00:31:51,578 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2022-03-20 00:31:51,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:51,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582478803] [2022-03-20 00:31:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:51,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:51,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:51,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533792365] [2022-03-20 00:31:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:51,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:51,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:51,588 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 00:31:51,601 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 00:31:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:51,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 00:31:51,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:31:51,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:31:51,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:51,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582478803] [2022-03-20 00:31:51,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:51,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533792365] [2022-03-20 00:31:51,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533792365] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:31:51,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:31:51,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 00:31:51,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299006225] [2022-03-20 00:31:51,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:31:51,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:31:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:31:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:31:51,850 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:31:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:51,876 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-20 00:31:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:31:51,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-03-20 00:31:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:51,877 INFO L225 Difference]: With dead ends: 57 [2022-03-20 00:31:51,877 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 00:31:51,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:31:51,878 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:51,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:31:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 00:31:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-20 00:31:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 00:31:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-03-20 00:31:51,884 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 41 [2022-03-20 00:31:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:51,885 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-03-20 00:31:51,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:31:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-03-20 00:31:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 00:31:51,885 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:51,886 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] [2022-03-20 00:31:51,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 00:31:52,101 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 00:31:52,102 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2022-03-20 00:31:52,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:52,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20887004] [2022-03-20 00:31:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:52,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:52,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:52,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188657283] [2022-03-20 00:31:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:52,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:52,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:52,112 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 00:31:52,113 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 00:31:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 00:31:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 00:31:52,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:52,389 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 00:31:52,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:52,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20887004] [2022-03-20 00:31:52,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:52,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188657283] [2022-03-20 00:31:52,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188657283] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:31:52,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:31:52,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 00:31:52,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772088127] [2022-03-20 00:31:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:31:52,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:31:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:31:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:31:52,391 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 00:31:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:52,423 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-03-20 00:31:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:31:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 46 [2022-03-20 00:31:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:52,424 INFO L225 Difference]: With dead ends: 61 [2022-03-20 00:31:52,424 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 00:31:52,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:31:52,425 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:52,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:31:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 00:31:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-20 00:31:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 00:31:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-03-20 00:31:52,432 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 46 [2022-03-20 00:31:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:52,432 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-03-20 00:31:52,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 00:31:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-03-20 00:31:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 00:31:52,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:52,433 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] [2022-03-20 00:31:52,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 00:31:52,648 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 00:31:52,648 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:52,651 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2022-03-20 00:31:52,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:52,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298246353] [2022-03-20 00:31:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:52,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:52,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:52,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159689080] [2022-03-20 00:31:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:52,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:52,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:52,700 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 00:31:52,702 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 00:31:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 00:31:52,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 00:31:52,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:53,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298246353] [2022-03-20 00:31:53,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:53,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159689080] [2022-03-20 00:31:53,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159689080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:31:53,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:31:53,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 00:31:53,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419437160] [2022-03-20 00:31:53,045 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:31:53,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:31:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:31:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:31:53,046 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 00:31:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:53,191 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-03-20 00:31:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 00:31:53,191 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-20 00:31:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:53,192 INFO L225 Difference]: With dead ends: 65 [2022-03-20 00:31:53,192 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 00:31:53,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 00:31:53,193 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:53,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 189 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:31:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 00:31:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 00:31:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 00:31:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-03-20 00:31:53,199 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 51 [2022-03-20 00:31:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:53,199 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-03-20 00:31:53,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 00:31:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-03-20 00:31:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 00:31:53,200 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:53,200 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:31:53,233 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 00:31:53,417 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 00:31:53,417 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2022-03-20 00:31:53,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:53,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126955577] [2022-03-20 00:31:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:53,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:53,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:53,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628425516] [2022-03-20 00:31:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:53,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:53,444 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 00:31:53,452 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 00:31:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:31:53,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 00:31:53,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 00:31:53,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:53,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126955577] [2022-03-20 00:31:53,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:53,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628425516] [2022-03-20 00:31:53,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628425516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:31:53,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:31:53,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 00:31:53,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658914827] [2022-03-20 00:31:53,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:31:53,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:31:53,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:53,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:31:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:31:53,711 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 00:31:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:53,839 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2022-03-20 00:31:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 00:31:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 60 [2022-03-20 00:31:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:53,842 INFO L225 Difference]: With dead ends: 215 [2022-03-20 00:31:53,842 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 00:31:53,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:31:53,843 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 84 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:53,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 280 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:31:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 00:31:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2022-03-20 00:31:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 130 states have internal predecessors, (150), 46 states have call successors, (46), 27 states have call predecessors, (46), 26 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 00:31:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 237 transitions. [2022-03-20 00:31:53,858 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 237 transitions. Word has length 60 [2022-03-20 00:31:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:53,858 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 237 transitions. [2022-03-20 00:31:53,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 00:31:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 237 transitions. [2022-03-20 00:31:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 00:31:53,859 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:53,859 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] [2022-03-20 00:31:53,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 00:31:54,077 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 00:31:54,078 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2022-03-20 00:31:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:54,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241300480] [2022-03-20 00:31:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:54,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:54,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:54,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277522436] [2022-03-20 00:31:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:54,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:54,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:54,087 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 00:31:54,088 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 00:31:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:54,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:31:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 00:31:54,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 00:31:54,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:54,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241300480] [2022-03-20 00:31:54,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:54,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277522436] [2022-03-20 00:31:54,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277522436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:31:54,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:31:54,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 00:31:54,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713386380] [2022-03-20 00:31:54,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:31:54,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:31:54,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:31:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:31:54,354 INFO L87 Difference]: Start difference. First operand 199 states and 237 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 00:31:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:54,501 INFO L93 Difference]: Finished difference Result 283 states and 368 transitions. [2022-03-20 00:31:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 00:31:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-03-20 00:31:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:54,503 INFO L225 Difference]: With dead ends: 283 [2022-03-20 00:31:54,503 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 00:31:54,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 00:31:54,504 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 62 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:54,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 451 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:31:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 00:31:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 239. [2022-03-20 00:31:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.2222222222222223) internal successors, (187), 156 states have internal predecessors, (187), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 00:31:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 303 transitions. [2022-03-20 00:31:54,529 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 303 transitions. Word has length 61 [2022-03-20 00:31:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:54,529 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 303 transitions. [2022-03-20 00:31:54,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 00:31:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 303 transitions. [2022-03-20 00:31:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 00:31:54,530 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:54,530 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:31:54,551 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 00:31:54,747 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 00:31:54,747 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash 428029148, now seen corresponding path program 1 times [2022-03-20 00:31:54,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:54,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204189738] [2022-03-20 00:31:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:54,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:54,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:54,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627500425] [2022-03-20 00:31:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:54,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:54,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:54,772 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 00:31:54,780 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 00:31:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:31:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 00:31:54,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 00:31:55,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204189738] [2022-03-20 00:31:55,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627500425] [2022-03-20 00:31:55,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627500425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:31:55,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:31:55,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 00:31:55,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460455391] [2022-03-20 00:31:55,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:31:55,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:31:55,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:31:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:31:55,074 INFO L87 Difference]: Start difference. First operand 239 states and 303 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 00:31:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:55,210 INFO L93 Difference]: Finished difference Result 348 states and 452 transitions. [2022-03-20 00:31:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 00:31:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 63 [2022-03-20 00:31:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:55,212 INFO L225 Difference]: With dead ends: 348 [2022-03-20 00:31:55,212 INFO L226 Difference]: Without dead ends: 252 [2022-03-20 00:31:55,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:31:55,213 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 100 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:55,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 207 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:31:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-20 00:31:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2022-03-20 00:31:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 00:31:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 306 transitions. [2022-03-20 00:31:55,227 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 306 transitions. Word has length 63 [2022-03-20 00:31:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:55,228 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 306 transitions. [2022-03-20 00:31:55,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 00:31:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 306 transitions. [2022-03-20 00:31:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 00:31:55,229 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:55,229 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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 00:31:55,254 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 00:31:55,454 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 00:31:55,455 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:55,455 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2022-03-20 00:31:55,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:55,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199135526] [2022-03-20 00:31:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:55,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:55,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:55,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969717917] [2022-03-20 00:31:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:55,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:55,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:55,480 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 00:31:55,481 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 00:31:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:55,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 00:31:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 00:31:55,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 00:31:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:55,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199135526] [2022-03-20 00:31:55,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:55,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969717917] [2022-03-20 00:31:55,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969717917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:31:55,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:31:55,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 00:31:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949669116] [2022-03-20 00:31:55,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:31:55,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 00:31:55,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:55,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 00:31:55,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:31:55,928 INFO L87 Difference]: Start difference. First operand 248 states and 306 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 00:31:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:56,303 INFO L93 Difference]: Finished difference Result 334 states and 433 transitions. [2022-03-20 00:31:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 00:31:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 68 [2022-03-20 00:31:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:56,306 INFO L225 Difference]: With dead ends: 334 [2022-03-20 00:31:56,307 INFO L226 Difference]: Without dead ends: 328 [2022-03-20 00:31:56,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-20 00:31:56,308 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 45 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:56,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 357 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 00:31:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-20 00:31:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2022-03-20 00:31:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 204 states have internal predecessors, (233), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2022-03-20 00:31:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2022-03-20 00:31:56,326 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 68 [2022-03-20 00:31:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:56,327 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2022-03-20 00:31:56,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 00:31:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2022-03-20 00:31:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 00:31:56,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:56,328 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2022-03-20 00:31:56,361 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 00:31:56,543 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 00:31:56,543 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:56,544 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2022-03-20 00:31:56,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:56,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176458386] [2022-03-20 00:31:56,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:56,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:56,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:56,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308399738] [2022-03-20 00:31:56,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:31:56,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:56,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:56,559 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 00:31:56,571 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 00:31:56,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:31:56,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:31:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 00:31:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 00:31:56,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 00:31:57,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176458386] [2022-03-20 00:31:57,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:57,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308399738] [2022-03-20 00:31:57,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308399738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:31:57,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:31:57,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-03-20 00:31:57,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770088026] [2022-03-20 00:31:57,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:31:57,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 00:31:57,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 00:31:57,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 00:31:57,182 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 00:31:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:58,572 INFO L93 Difference]: Finished difference Result 319 states and 399 transitions. [2022-03-20 00:31:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 00:31:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 73 [2022-03-20 00:31:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:58,576 INFO L225 Difference]: With dead ends: 319 [2022-03-20 00:31:58,577 INFO L226 Difference]: Without dead ends: 316 [2022-03-20 00:31:58,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-20 00:31:58,578 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:58,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 401 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 00:31:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-03-20 00:31:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 305. [2022-03-20 00:31:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 204 states have (on average 1.1862745098039216) internal successors, (242), 212 states have internal predecessors, (242), 69 states have call successors, (69), 32 states have call predecessors, (69), 31 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-20 00:31:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 376 transitions. [2022-03-20 00:31:58,613 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 376 transitions. Word has length 73 [2022-03-20 00:31:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:58,613 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 376 transitions. [2022-03-20 00:31:58,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 00:31:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 376 transitions. [2022-03-20 00:31:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 00:31:58,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:58,615 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-03-20 00:31:58,634 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 00:31:58,834 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 00:31:58,834 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2022-03-20 00:31:58,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:58,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539649672] [2022-03-20 00:31:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:58,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:58,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:58,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680745539] [2022-03-20 00:31:58,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:31:58,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:58,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:58,856 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 00:31:58,858 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 00:31:58,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 00:31:58,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:31:58,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 00:31:58,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:31:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 00:31:59,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:31:59,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:31:59,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539649672] [2022-03-20 00:31:59,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:31:59,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680745539] [2022-03-20 00:31:59,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680745539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:31:59,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:31:59,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 00:31:59,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978479426] [2022-03-20 00:31:59,440 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:31:59,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:31:59,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:31:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:31:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:31:59,441 INFO L87 Difference]: Start difference. First operand 305 states and 376 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 00:31:59,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:31:59,636 INFO L93 Difference]: Finished difference Result 337 states and 411 transitions. [2022-03-20 00:31:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 00:31:59,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-03-20 00:31:59,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:31:59,640 INFO L225 Difference]: With dead ends: 337 [2022-03-20 00:31:59,640 INFO L226 Difference]: Without dead ends: 333 [2022-03-20 00:31:59,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:31:59,641 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 23 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:31:59,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 281 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:31:59,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-20 00:31:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2022-03-20 00:31:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 221 states have (on average 1.1764705882352942) internal successors, (260), 228 states have internal predecessors, (260), 73 states have call successors, (73), 37 states have call predecessors, (73), 35 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 00:31:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 402 transitions. [2022-03-20 00:31:59,665 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 402 transitions. Word has length 78 [2022-03-20 00:31:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:31:59,665 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 402 transitions. [2022-03-20 00:31:59,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 00:31:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 402 transitions. [2022-03-20 00:31:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 00:31:59,666 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:31:59,666 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2022-03-20 00:31:59,684 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 00:31:59,876 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 00:31:59,876 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:31:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:31:59,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2022-03-20 00:31:59,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:31:59,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064711055] [2022-03-20 00:31:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:59,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:31:59,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:31:59,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268817531] [2022-03-20 00:31:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:31:59,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:31:59,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:31:59,896 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 00:31:59,911 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 00:31:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:31:59,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 00:31:59,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:32:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-20 00:32:00,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:32:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-20 00:32:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:32:00,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064711055] [2022-03-20 00:32:00,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:32:00,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268817531] [2022-03-20 00:32:00,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268817531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:32:00,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:32:00,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 00:32:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625278560] [2022-03-20 00:32:00,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:32:00,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 00:32:00,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:32:00,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 00:32:00,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-20 00:32:00,904 INFO L87 Difference]: Start difference. First operand 330 states and 402 transitions. Second operand has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 00:32:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:32:03,227 INFO L93 Difference]: Finished difference Result 392 states and 488 transitions. [2022-03-20 00:32:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 00:32:03,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 84 [2022-03-20 00:32:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:32:03,229 INFO L225 Difference]: With dead ends: 392 [2022-03-20 00:32:03,230 INFO L226 Difference]: Without dead ends: 377 [2022-03-20 00:32:03,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 00:32:03,231 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 99 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 00:32:03,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 495 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 00:32:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-20 00:32:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 368. [2022-03-20 00:32:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 247 states have (on average 1.1902834008097165) internal successors, (294), 252 states have internal predecessors, (294), 84 states have call successors, (84), 37 states have call predecessors, (84), 36 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 00:32:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 460 transitions. [2022-03-20 00:32:03,267 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 460 transitions. Word has length 84 [2022-03-20 00:32:03,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:32:03,267 INFO L478 AbstractCegarLoop]: Abstraction has 368 states and 460 transitions. [2022-03-20 00:32:03,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 00:32:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 460 transitions. [2022-03-20 00:32:03,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 00:32:03,268 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:32:03,268 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2022-03-20 00:32:03,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 00:32:03,483 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 00:32:03,484 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:32:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:32:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2022-03-20 00:32:03,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:32:03,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889074000] [2022-03-20 00:32:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:32:03,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:32:03,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:32:03,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156812827] [2022-03-20 00:32:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:32:03,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:32:03,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:32:03,501 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 00:32:03,503 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 00:32:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:32:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 00:32:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:32:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-20 00:32:04,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:32:04,709 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:32:05,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:32:05,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889074000] [2022-03-20 00:32:05,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:32:05,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156812827] [2022-03-20 00:32:05,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156812827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:32:05,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:32:05,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 00:32:05,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353935529] [2022-03-20 00:32:05,485 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:32:05,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 00:32:05,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:32:05,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 00:32:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 00:32:05,486 INFO L87 Difference]: Start difference. First operand 368 states and 460 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 00:32:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:32:06,091 INFO L93 Difference]: Finished difference Result 377 states and 468 transitions. [2022-03-20 00:32:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 00:32:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2022-03-20 00:32:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:32:06,094 INFO L225 Difference]: With dead ends: 377 [2022-03-20 00:32:06,094 INFO L226 Difference]: Without dead ends: 375 [2022-03-20 00:32:06,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-20 00:32:06,094 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 29 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 00:32:06,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 438 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 00:32:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-20 00:32:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 372. [2022-03-20 00:32:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 250 states have (on average 1.184) internal successors, (296), 255 states have internal predecessors, (296), 84 states have call successors, (84), 38 states have call predecessors, (84), 37 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 00:32:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 462 transitions. [2022-03-20 00:32:06,130 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 462 transitions. Word has length 101 [2022-03-20 00:32:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:32:06,130 INFO L478 AbstractCegarLoop]: Abstraction has 372 states and 462 transitions. [2022-03-20 00:32:06,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 00:32:06,131 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 462 transitions. [2022-03-20 00:32:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 00:32:06,131 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:32:06,131 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2022-03-20 00:32:06,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 00:32:06,350 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 00:32:06,350 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:32:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:32:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2076615365, now seen corresponding path program 4 times [2022-03-20 00:32:06,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:32:06,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120233286] [2022-03-20 00:32:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:32:06,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:32:06,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:32:06,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491804708] [2022-03-20 00:32:06,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 00:32:06,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:32:06,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:32:06,365 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 00:32:06,366 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 00:32:06,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 00:32:06,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:32:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:32:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:32:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-20 00:32:06,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:32:06,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:32:06,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120233286] [2022-03-20 00:32:06,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:32:06,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491804708] [2022-03-20 00:32:06,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491804708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:32:06,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:32:06,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:32:06,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431454621] [2022-03-20 00:32:06,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:32:06,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:32:06,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:32:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:32:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:32:06,565 INFO L87 Difference]: Start difference. First operand 372 states and 462 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-20 00:32:06,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:32:06,644 INFO L93 Difference]: Finished difference Result 535 states and 713 transitions. [2022-03-20 00:32:06,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:32:06,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 105 [2022-03-20 00:32:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:32:06,646 INFO L225 Difference]: With dead ends: 535 [2022-03-20 00:32:06,646 INFO L226 Difference]: Without dead ends: 417 [2022-03-20 00:32:06,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 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 00:32:06,647 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:32:06,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:32:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-03-20 00:32:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 387. [2022-03-20 00:32:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 259 states have (on average 1.193050193050193) internal successors, (309), 263 states have internal predecessors, (309), 90 states have call successors, (90), 38 states have call predecessors, (90), 37 states have return successors, (88), 85 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-20 00:32:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 487 transitions. [2022-03-20 00:32:06,686 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 487 transitions. Word has length 105 [2022-03-20 00:32:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:32:06,686 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 487 transitions. [2022-03-20 00:32:06,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-20 00:32:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 487 transitions. [2022-03-20 00:32:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 00:32:06,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:32:06,688 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:32:06,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 00:32:06,895 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 00:32:06,896 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:32:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:32:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 1 times [2022-03-20 00:32:06,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:32:06,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495038876] [2022-03-20 00:32:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:32:06,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:32:06,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:32:06,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049379643] [2022-03-20 00:32:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:32:06,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:32:06,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:32:06,912 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 00:32:06,914 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 00:32:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:32:06,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 00:32:06,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:32:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-20 00:32:07,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:32:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 00:32:07,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:32:07,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495038876] [2022-03-20 00:32:07,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:32:07,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049379643] [2022-03-20 00:32:07,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049379643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:32:07,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:32:07,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 00:32:07,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282350098] [2022-03-20 00:32:07,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:32:07,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 00:32:07,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:32:07,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 00:32:07,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 00:32:07,473 INFO L87 Difference]: Start difference. First operand 387 states and 487 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-20 00:32:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:32:07,967 INFO L93 Difference]: Finished difference Result 1393 states and 1817 transitions. [2022-03-20 00:32:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 00:32:07,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 116 [2022-03-20 00:32:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:32:07,972 INFO L225 Difference]: With dead ends: 1393 [2022-03-20 00:32:07,972 INFO L226 Difference]: Without dead ends: 1260 [2022-03-20 00:32:07,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2022-03-20 00:32:07,974 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 318 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:32:07,974 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 456 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 00:32:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-20 00:32:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1202. [2022-03-20 00:32:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 771 states have (on average 1.1595330739299612) internal successors, (894), 782 states have internal predecessors, (894), 305 states have call successors, (305), 126 states have call predecessors, (305), 125 states have return successors, (296), 293 states have call predecessors, (296), 296 states have call successors, (296) [2022-03-20 00:32:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1495 transitions. [2022-03-20 00:32:08,114 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1495 transitions. Word has length 116 [2022-03-20 00:32:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:32:08,114 INFO L478 AbstractCegarLoop]: Abstraction has 1202 states and 1495 transitions. [2022-03-20 00:32:08,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-20 00:32:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1495 transitions. [2022-03-20 00:32:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 00:32:08,115 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:32:08,116 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 00:32:08,146 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 00:32:08,331 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 00:32:08,332 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:32:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:32:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 2 times [2022-03-20 00:32:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:32:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708757082] [2022-03-20 00:32:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:32:08,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:32:08,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:32:08,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027374014] [2022-03-20 00:32:08,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:32:08,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:32:08,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:32:08,346 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 00:32:08,347 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 00:32:08,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:32:08,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:32:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 00:32:08,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:32:11,788 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:32:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 139 proven. 92 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-03-20 00:32:14,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:32:22,757 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:32:32,656 WARN L232 SmtUtils]: Spent 7.37s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:32:38,194 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:32:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 136 proven. 86 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-03-20 00:32:43,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:32:43,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708757082] [2022-03-20 00:32:43,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:32:43,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027374014] [2022-03-20 00:32:43,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027374014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:32:43,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:32:43,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-20 00:32:43,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443536966] [2022-03-20 00:32:43,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:32:43,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 00:32:43,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:32:43,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 00:32:43,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=636, Unknown=5, NotChecked=0, Total=812 [2022-03-20 00:32:43,986 INFO L87 Difference]: Start difference. First operand 1202 states and 1495 transitions. Second operand has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) [2022-03-20 00:32:46,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:32:48,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:32:50,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:32:53,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:32:55,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:33:04,172 WARN L232 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 127 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:33:06,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:33:13,573 WARN L534 Checker$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 00:33:17,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:33:18,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:33:21,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:33:23,307 WARN L534 Checker$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 00:33:34,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:33:40,670 WARN L534 Checker$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 00:33:45,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:33:47,229 WARN L534 Checker$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 00:33:49,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:33:51,236 WARN L534 Checker$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 00:34:30,150 WARN L232 SmtUtils]: Spent 32.95s on a formula simplification. DAG size of input: 129 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:34:32,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:34:34,174 WARN L534 Checker$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 00:34:36,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:34:41,372 WARN L534 Checker$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 00:34:43,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:34:47,875 WARN L534 Checker$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 00:34:50,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:35:11,010 WARN L232 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 52 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:35:13,063 WARN L534 Checker$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 00:35:15,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:35:17,090 WARN L534 Checker$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 00:35:26,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:35:28,052 WARN L534 Checker$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 00:35:30,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:35:32,063 WARN L534 Checker$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 00:35:41,079 WARN L232 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 147 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:35:46,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:35:48,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:35:52,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:36:02,829 WARN L232 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 128 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:36:10,486 WARN L232 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 87 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:36:51,923 WARN L232 SmtUtils]: Spent 37.04s on a formula simplification. DAG size of input: 110 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:36:53,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:36:55,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:36:57,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:00,246 WARN L232 SmtUtils]: Spent 59.22s on a formula simplification. DAG size of input: 146 DAG size of output: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:38:02,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:04,654 WARN L534 Checker$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 00:38:05,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:07,882 WARN L534 Checker$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 00:38:09,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:11,889 WARN L534 Checker$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 00:38:13,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:16,291 WARN L534 Checker$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 00:38:18,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:20,309 WARN L534 Checker$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 00:38:23,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:26,218 WARN L534 Checker$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 00:38:28,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:30,225 WARN L534 Checker$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 00:38:32,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:34,281 WARN L534 Checker$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 00:38:36,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:38,411 WARN L534 Checker$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 00:38:40,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:42,426 WARN L534 Checker$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 00:38:44,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:46,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:48,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:50,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:52,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:38:54,506 WARN L534 Checker$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 00:38:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:38:54,524 INFO L93 Difference]: Finished difference Result 1626 states and 2111 transitions. [2022-03-20 00:38:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 00:38:54,527 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) Word has length 124 [2022-03-20 00:38:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:38:54,532 INFO L225 Difference]: With dead ends: 1626 [2022-03-20 00:38:54,532 INFO L226 Difference]: Without dead ends: 1624 [2022-03-20 00:38:54,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 219 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 252.3s TimeCoverageRelationStatistics Valid=611, Invalid=2028, Unknown=13, NotChecked=0, Total=2652 [2022-03-20 00:38:54,534 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 211 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 298 mSolverCounterUnsat, 55 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 55 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.6s IncrementalHoareTripleChecker+Time [2022-03-20 00:38:54,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 784 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1071 Invalid, 55 Unknown, 0 Unchecked, 145.6s Time] [2022-03-20 00:38:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2022-03-20 00:38:54,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1545. [2022-03-20 00:38:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 972 states have (on average 1.1779835390946503) internal successors, (1145), 988 states have internal predecessors, (1145), 430 states have call successors, (430), 143 states have call predecessors, (430), 142 states have return successors, (421), 413 states have call predecessors, (421), 421 states have call successors, (421) [2022-03-20 00:38:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 1996 transitions. [2022-03-20 00:38:54,840 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 1996 transitions. Word has length 124 [2022-03-20 00:38:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:38:54,840 INFO L478 AbstractCegarLoop]: Abstraction has 1545 states and 1996 transitions. [2022-03-20 00:38:54,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) [2022-03-20 00:38:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 1996 transitions. [2022-03-20 00:38:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 00:38:54,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:38:54,843 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:38:54,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 00:38:55,063 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 00:38:55,063 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:38:55,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:38:55,064 INFO L85 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 3 times [2022-03-20 00:38:55,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:38:55,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552771829] [2022-03-20 00:38:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:38:55,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:38:55,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:38:55,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024382257] [2022-03-20 00:38:55,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:38:55,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:38:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:38:55,076 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 00:38:55,106 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 00:38:55,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 00:38:55,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:38:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 00:38:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:38:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 100 proven. 57 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 00:38:56,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:39:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 00:39:09,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:39:09,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552771829] [2022-03-20 00:39:09,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:39:09,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024382257] [2022-03-20 00:39:09,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024382257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:39:09,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:39:09,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-20 00:39:09,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762309569] [2022-03-20 00:39:09,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:39:09,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 00:39:09,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:39:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 00:39:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-20 00:39:09,905 INFO L87 Difference]: Start difference. First operand 1545 states and 1996 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-03-20 00:39:11,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:39:24,027 WARN L232 SmtUtils]: Spent 7.97s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:39:37,127 WARN L232 SmtUtils]: Spent 12.33s on a formula simplification. DAG size of input: 82 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:39:38,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:39:40,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:39:49,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:39:56,200 WARN L232 SmtUtils]: Spent 7.06s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:39:58,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:00,440 WARN L534 Checker$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 00:40:02,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:11,728 WARN L534 Checker$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 00:40:13,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:16,537 WARN L534 Checker$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 00:40:18,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:20,609 WARN L534 Checker$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 00:40:22,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:25,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:27,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:31,388 WARN L534 Checker$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 00:40:37,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:39,164 WARN L534 Checker$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 00:40:41,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:43,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:40:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:43,506 INFO L93 Difference]: Finished difference Result 1885 states and 2471 transitions. [2022-03-20 00:40:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 00:40:43,507 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) Word has length 128 [2022-03-20 00:40:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:43,514 INFO L225 Difference]: With dead ends: 1885 [2022-03-20 00:40:43,514 INFO L226 Difference]: Without dead ends: 1869 [2022-03-20 00:40:43,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 233 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=352, Invalid=978, Unknown=2, NotChecked=0, Total=1332 [2022-03-20 00:40:43,515 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 151 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 214 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:43,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 688 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 755 Invalid, 18 Unknown, 0 Unchecked, 48.1s Time] [2022-03-20 00:40:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-03-20 00:40:43,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1756. [2022-03-20 00:40:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1118 states have (on average 1.1914132379248659) internal successors, (1332), 1130 states have internal predecessors, (1332), 482 states have call successors, (482), 157 states have call predecessors, (482), 155 states have return successors, (479), 468 states have call predecessors, (479), 479 states have call successors, (479) [2022-03-20 00:40:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2293 transitions. [2022-03-20 00:40:43,993 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2293 transitions. Word has length 128 [2022-03-20 00:40:43,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:43,993 INFO L478 AbstractCegarLoop]: Abstraction has 1756 states and 2293 transitions. [2022-03-20 00:40:43,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-03-20 00:40:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2293 transitions. [2022-03-20 00:40:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 00:40:43,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:43,994 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 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] [2022-03-20 00:40:44,029 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 00:40:44,213 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 00:40:44,213 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 1 times [2022-03-20 00:40:44,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:44,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901230419] [2022-03-20 00:40:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:44,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:44,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:44,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009771385] [2022-03-20 00:40:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:44,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:44,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:44,220 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 00:40:44,221 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 00:40:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:44,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 00:40:44,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 00:40:44,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 00:40:44,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:44,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901230419] [2022-03-20 00:40:44,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:44,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009771385] [2022-03-20 00:40:44,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009771385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:40:44,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:40:44,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 00:40:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542960814] [2022-03-20 00:40:44,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:44,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 00:40:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 00:40:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 00:40:44,762 INFO L87 Difference]: Start difference. First operand 1756 states and 2293 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-20 00:40:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:45,584 INFO L93 Difference]: Finished difference Result 1819 states and 2355 transitions. [2022-03-20 00:40:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 00:40:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) Word has length 133 [2022-03-20 00:40:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:45,591 INFO L225 Difference]: With dead ends: 1819 [2022-03-20 00:40:45,591 INFO L226 Difference]: Without dead ends: 1809 [2022-03-20 00:40:45,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-03-20 00:40:45,594 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 280 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:45,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 444 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:40:45,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-03-20 00:40:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1777. [2022-03-20 00:40:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1139 states have (on average 1.160667251975417) internal successors, (1322), 1151 states have internal predecessors, (1322), 482 states have call successors, (482), 157 states have call predecessors, (482), 155 states have return successors, (479), 468 states have call predecessors, (479), 479 states have call successors, (479) [2022-03-20 00:40:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2283 transitions. [2022-03-20 00:40:46,093 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2283 transitions. Word has length 133 [2022-03-20 00:40:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:46,094 INFO L478 AbstractCegarLoop]: Abstraction has 1777 states and 2283 transitions. [2022-03-20 00:40:46,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-20 00:40:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2283 transitions. [2022-03-20 00:40:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 00:40:46,095 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:46,095 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 00:40:46,119 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 00:40:46,313 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 00:40:46,314 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:46,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 2 times [2022-03-20 00:40:46,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:46,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114875323] [2022-03-20 00:40:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:46,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:46,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:46,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813319598] [2022-03-20 00:40:46,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:40:46,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:46,324 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 00:40:46,325 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 00:40:46,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:40:46,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:40:46,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 00:40:46,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 123 proven. 126 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-20 00:40:48,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 00:40:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:49,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114875323] [2022-03-20 00:40:49,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:49,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813319598] [2022-03-20 00:40:49,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813319598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:40:49,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:40:49,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-20 00:40:49,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742279424] [2022-03-20 00:40:49,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:49,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 00:40:49,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 00:40:49,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-20 00:40:49,179 INFO L87 Difference]: Start difference. First operand 1777 states and 2283 transitions. Second operand has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-20 00:40:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:54,944 INFO L93 Difference]: Finished difference Result 1899 states and 2421 transitions. [2022-03-20 00:40:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 00:40:54,945 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 134 [2022-03-20 00:40:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:54,951 INFO L225 Difference]: With dead ends: 1899 [2022-03-20 00:40:54,951 INFO L226 Difference]: Without dead ends: 1888 [2022-03-20 00:40:54,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 00:40:54,952 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 128 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:54,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 734 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 00:40:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-03-20 00:40:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1729. [2022-03-20 00:40:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1098 states have (on average 1.138433515482696) internal successors, (1250), 1113 states have internal predecessors, (1250), 461 states have call successors, (461), 170 states have call predecessors, (461), 169 states have return successors, (459), 445 states have call predecessors, (459), 459 states have call successors, (459) [2022-03-20 00:40:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2170 transitions. [2022-03-20 00:40:55,419 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2170 transitions. Word has length 134 [2022-03-20 00:40:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:55,420 INFO L478 AbstractCegarLoop]: Abstraction has 1729 states and 2170 transitions. [2022-03-20 00:40:55,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-20 00:40:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2170 transitions. [2022-03-20 00:40:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-03-20 00:40:55,424 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:55,424 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:55,441 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 00:40:55,641 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 00:40:55,641 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2083543191, now seen corresponding path program 2 times [2022-03-20 00:40:55,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:55,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270305749] [2022-03-20 00:40:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:55,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:55,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832949787] [2022-03-20 00:40:55,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:40:55,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:55,652 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 00:40:55,653 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 00:40:55,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:40:55,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:40:55,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 00:40:55,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 72 proven. 2606 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 00:40:56,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 72 proven. 302 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 00:40:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:56,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270305749] [2022-03-20 00:40:56,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:56,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832949787] [2022-03-20 00:40:56,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832949787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:40:56,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:40:56,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 00:40:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286191073] [2022-03-20 00:40:56,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:56,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 00:40:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 00:40:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 00:40:56,833 INFO L87 Difference]: Start difference. First operand 1729 states and 2170 transitions. Second operand has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-20 00:40:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:59,809 INFO L93 Difference]: Finished difference Result 6934 states and 9753 transitions. [2022-03-20 00:40:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 00:40:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) Word has length 260 [2022-03-20 00:40:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:59,831 INFO L225 Difference]: With dead ends: 6934 [2022-03-20 00:40:59,832 INFO L226 Difference]: Without dead ends: 6925 [2022-03-20 00:40:59,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1384, Invalid=2398, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 00:40:59,835 INFO L913 BasicCegarLoop]: 152 mSDtfsCounter, 720 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:59,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 810 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 00:40:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2022-03-20 00:41:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 6797. [2022-03-20 00:41:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6797 states, 4391 states have (on average 1.223183785014803) internal successors, (5371), 4532 states have internal predecessors, (5371), 1967 states have call successors, (1967), 440 states have call predecessors, (1967), 438 states have return successors, (1951), 1824 states have call predecessors, (1951), 1951 states have call successors, (1951) [2022-03-20 00:41:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6797 states to 6797 states and 9289 transitions. [2022-03-20 00:41:02,088 INFO L78 Accepts]: Start accepts. Automaton has 6797 states and 9289 transitions. Word has length 260 [2022-03-20 00:41:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:02,130 INFO L478 AbstractCegarLoop]: Abstraction has 6797 states and 9289 transitions. [2022-03-20 00:41:02,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-20 00:41:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6797 states and 9289 transitions. [2022-03-20 00:41:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-20 00:41:02,134 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:02,134 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:02,153 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 00:41:02,335 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 00:41:02,335 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash 996673892, now seen corresponding path program 1 times [2022-03-20 00:41:02,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:02,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203973170] [2022-03-20 00:41:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:02,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:02,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:02,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506823403] [2022-03-20 00:41:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:02,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:02,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:02,355 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 00:41:02,357 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 00:41:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:02,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 00:41:02,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 91 proven. 2610 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 00:41:02,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 91 proven. 306 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 00:41:03,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203973170] [2022-03-20 00:41:03,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506823403] [2022-03-20 00:41:03,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506823403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:41:03,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:41:03,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 00:41:03,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868621946] [2022-03-20 00:41:03,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:03,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 00:41:03,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:03,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 00:41:03,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 00:41:03,551 INFO L87 Difference]: Start difference. First operand 6797 states and 9289 transitions. Second operand has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-20 00:41:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:06,130 INFO L93 Difference]: Finished difference Result 7838 states and 10739 transitions. [2022-03-20 00:41:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 00:41:06,131 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) Word has length 263 [2022-03-20 00:41:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:06,146 INFO L225 Difference]: With dead ends: 7838 [2022-03-20 00:41:06,146 INFO L226 Difference]: Without dead ends: 4561 [2022-03-20 00:41:06,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1383, Invalid=2399, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 00:41:06,154 INFO L913 BasicCegarLoop]: 152 mSDtfsCounter, 635 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:06,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 766 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 00:41:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2022-03-20 00:41:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 4273. [2022-03-20 00:41:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 2618 states have (on average 1.1130634071810543) internal successors, (2914), 2649 states have internal predecessors, (2914), 1229 states have call successors, (1229), 426 states have call predecessors, (1229), 425 states have return successors, (1227), 1197 states have call predecessors, (1227), 1227 states have call successors, (1227) [2022-03-20 00:41:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 5370 transitions. [2022-03-20 00:41:07,320 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 5370 transitions. Word has length 263 [2022-03-20 00:41:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:07,321 INFO L478 AbstractCegarLoop]: Abstraction has 4273 states and 5370 transitions. [2022-03-20 00:41:07,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-20 00:41:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 5370 transitions. [2022-03-20 00:41:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-03-20 00:41:07,332 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:07,332 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 76, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 11, 11, 11, 10, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:07,369 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 00:41:07,559 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 00:41:07,560 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash 797964696, now seen corresponding path program 2 times [2022-03-20 00:41:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:07,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551875402] [2022-03-20 00:41:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:07,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:07,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108890131] [2022-03-20 00:41:07,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:41:07,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:07,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:07,583 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 00:41:07,583 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 00:41:07,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:41:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:41:07,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 00:41:07,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13053 backedges. 184 proven. 12389 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 00:41:08,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13053 backedges. 184 proven. 1445 refuted. 0 times theorem prover too weak. 11424 trivial. 0 not checked. [2022-03-20 00:41:10,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:10,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551875402] [2022-03-20 00:41:10,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:10,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108890131] [2022-03-20 00:41:10,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108890131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:41:10,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:41:10,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-03-20 00:41:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932894171] [2022-03-20 00:41:10,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:10,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 00:41:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:10,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 00:41:10,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 00:41:10,069 INFO L87 Difference]: Start difference. First operand 4273 states and 5370 transitions. Second operand has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 42 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (162), 40 states have call predecessors, (162), 41 states have call successors, (162) [2022-03-20 00:41:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:15,377 INFO L93 Difference]: Finished difference Result 10411 states and 13603 transitions. [2022-03-20 00:41:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-20 00:41:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 42 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (162), 40 states have call predecessors, (162), 41 states have call successors, (162) Word has length 516 [2022-03-20 00:41:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:15,409 INFO L225 Difference]: With dead ends: 10411 [2022-03-20 00:41:15,409 INFO L226 Difference]: Without dead ends: 10086 [2022-03-20 00:41:15,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5831, Invalid=9919, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 00:41:15,416 INFO L913 BasicCegarLoop]: 280 mSDtfsCounter, 1914 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 1617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1617 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:15,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1914 Valid, 1537 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1617 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 00:41:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2022-03-20 00:41:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 9346. [2022-03-20 00:41:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9346 states, 5642 states have (on average 1.1199929103154909) internal successors, (6319), 5705 states have internal predecessors, (6319), 2766 states have call successors, (2766), 939 states have call predecessors, (2766), 937 states have return successors, (2763), 2701 states have call predecessors, (2763), 2763 states have call successors, (2763) [2022-03-20 00:41:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9346 states to 9346 states and 11848 transitions. [2022-03-20 00:41:18,161 INFO L78 Accepts]: Start accepts. Automaton has 9346 states and 11848 transitions. Word has length 516 [2022-03-20 00:41:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:18,162 INFO L478 AbstractCegarLoop]: Abstraction has 9346 states and 11848 transitions. [2022-03-20 00:41:18,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 42 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (162), 40 states have call predecessors, (162), 41 states have call successors, (162) [2022-03-20 00:41:18,162 INFO L276 IsEmpty]: Start isEmpty. Operand 9346 states and 11848 transitions. [2022-03-20 00:41:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-03-20 00:41:18,172 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:18,172 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 80, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 11, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:18,193 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 00:41:18,387 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 00:41:18,387 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2048195451, now seen corresponding path program 3 times [2022-03-20 00:41:18,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:18,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155651070] [2022-03-20 00:41:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:18,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:18,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061329311] [2022-03-20 00:41:18,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:41:18,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:18,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:18,424 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 00:41:18,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process