/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 20:57:41,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 20:57:41,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 20:57:41,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 20:57:41,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 20:57:41,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 20:57:41,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 20:57:41,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 20:57:41,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 20:57:41,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 20:57:41,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 20:57:41,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-15 20:57:41,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 20:57:41,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 20:57:41,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 20:57:41,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 20:57:41,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 20:57:41,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 20:57:42,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 20:57:42,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 20:57:42,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 20:57:42,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 20:57:42,003 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 20:57:42,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 20:57:42,003 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 20:57:42,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 20:57:42,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 20:57:42,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 20:57:42,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 20:57:42,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 20:57:42,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 20:57:42,005 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 20:57:42,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 20:57:42,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 20:57:42,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 20:57:42,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 20:57:42,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 20:57:42,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 20:57:42,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 20:57:42,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:57:42,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 20:57:42,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 20:57:42,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 20:57:42,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 20:57:42,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 20:57:42,006 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 20:57:42,006 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 20:57:42,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 20:57:42,006 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 20:57:42,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 20:57:42,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 20:57:42,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 20:57:42,233 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 20:57:42,234 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 20:57:42,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl [2022-03-15 20:57:42,235 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl' [2022-03-15 20:57:42,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 20:57:42,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 20:57:42,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 20:57:42,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 20:57:42,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 20:57:42,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,279 INFO L137 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 20:57:42,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 20:57:42,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 20:57:42,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 20:57:42,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 20:57:42,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 20:57:42,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 20:57:42,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 20:57:42,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 20:57:42,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/1) ... [2022-03-15 20:57:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:57:42,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:57:42,316 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) [2022-03-15 20:57:42,323 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 [2022-03-15 20:57:42,347 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 20:57:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 20:57:42,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 20:57:42,347 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 20:57:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 20:57:42,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 20:57:42,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 20:57:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 20:57:42,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 20:57:42,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 20:57:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 20:57:42,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 20:57:42,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-15 20:57:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-15 20:57:42,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-15 20:57:42,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-03-15 20:57:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-03-15 20:57:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-03-15 20:57:42,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2022-03-15 20:57:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-03-15 20:57:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-03-15 20:57:42,350 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 20:57:42,383 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 20:57:42,384 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 20:57:42,460 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 20:57:42,465 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 20:57:42,465 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 20:57:42,466 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:57:42 BoogieIcfgContainer [2022-03-15 20:57:42,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 20:57:42,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 20:57:42,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 20:57:42,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 20:57:42,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:57:42" (1/2) ... [2022-03-15 20:57:42,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da52844 and model type exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:57:42, skipping insertion in model container [2022-03-15 20:57:42,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:57:42" (2/2) ... [2022-03-15 20:57:42,472 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3.wvr.bpl [2022-03-15 20:57:42,494 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 20:57:42,494 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 20:57:42,494 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 20:57:42,494 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 20:57:42,529 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-03-15 20:57:42,572 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:57:42,577 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 20:57:42,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-03-15 20:57:42,600 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:57:42,607 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 47 transitions, 142 flow [2022-03-15 20:57:42,608 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 47 transitions, 142 flow [2022-03-15 20:57:42,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 60 places, 47 transitions, 142 flow [2022-03-15 20:57:42,649 INFO L129 PetriNetUnfolder]: 6/41 cut-off events. [2022-03-15 20:57:42,649 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-03-15 20:57:42,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 41 events. 6/41 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2022-03-15 20:57:42,660 INFO L116 LiptonReduction]: Number of co-enabled transitions 720 [2022-03-15 20:57:42,865 INFO L131 LiptonReduction]: Checked pairs total: 580 [2022-03-15 20:57:42,865 INFO L133 LiptonReduction]: Total number of compositions: 15 [2022-03-15 20:57:42,873 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 33 transitions, 114 flow [2022-03-15 20:57:42,937 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 192 states, 191 states have (on average 5.382198952879581) internal successors, (1028), 191 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 191 states have (on average 5.382198952879581) internal successors, (1028), 191 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 20:57:42,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:57:42,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:57:42,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:57:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:57:42,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1104175190, now seen corresponding path program 1 times [2022-03-15 20:57:42,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:57:42,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168734514] [2022-03-15 20:57:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:57:42,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:57:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:57:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:43,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:57:43,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168734514] [2022-03-15 20:57:43,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168734514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:57:43,099 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:57:43,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 20:57:43,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [736966374] [2022-03-15 20:57:43,101 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:57:43,104 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:57:43,156 INFO L252 McrAutomatonBuilder]: Finished intersection with 192 states and 578 transitions. [2022-03-15 20:57:43,156 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:57:47,829 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:57:47,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 20:57:47,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:57:47,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 20:57:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 20:57:47,847 INFO L87 Difference]: Start difference. First operand has 192 states, 191 states have (on average 5.382198952879581) internal successors, (1028), 191 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:57:47,886 INFO L93 Difference]: Finished difference Result 381 states and 2053 transitions. [2022-03-15 20:57:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 20:57:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 20:57:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:57:47,897 INFO L225 Difference]: With dead ends: 381 [2022-03-15 20:57:47,898 INFO L226 Difference]: Without dead ends: 374 [2022-03-15 20:57:47,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 20:57:47,900 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:57:47,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:57:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-03-15 20:57:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2022-03-15 20:57:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 5.431635388739946) internal successors, (2026), 373 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 2026 transitions. [2022-03-15 20:57:47,984 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 2026 transitions. Word has length 20 [2022-03-15 20:57:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:57:47,985 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 2026 transitions. [2022-03-15 20:57:47,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 2026 transitions. [2022-03-15 20:57:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 20:57:47,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:57:47,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:57:47,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 20:57:47,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:57:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:57:47,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1041957893, now seen corresponding path program 1 times [2022-03-15 20:57:47,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:57:47,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915239288] [2022-03-15 20:57:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:57:47,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:57:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:57:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:48,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:57:48,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915239288] [2022-03-15 20:57:48,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915239288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:57:48,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626770744] [2022-03-15 20:57:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:57:48,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:57:48,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:57:48,060 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) [2022-03-15 20:57:48,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 20:57:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:57:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 20:57:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:57:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:48,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:57:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:48,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626770744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:57:48,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:57:48,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-03-15 20:57:48,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [938688947] [2022-03-15 20:57:48,189 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:57:48,191 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:57:48,226 INFO L252 McrAutomatonBuilder]: Finished intersection with 255 states and 801 transitions. [2022-03-15 20:57:48,226 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:57:50,655 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1707#(or (not (< x1 n)) (< x2 n) (< (* 2 x1) n)), 1704#(< x1 n), 1706#(or (not (< x1 n)) (< (* 2 x1) n)), 1705#(or (< x1 n) (< x2 n))] [2022-03-15 20:57:50,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 20:57:50,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:57:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 20:57:50,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:57:50,656 INFO L87 Difference]: Start difference. First operand 374 states and 2026 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:57:50,934 INFO L93 Difference]: Finished difference Result 1012 states and 5324 transitions. [2022-03-15 20:57:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 20:57:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 20:57:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:57:50,941 INFO L225 Difference]: With dead ends: 1012 [2022-03-15 20:57:50,941 INFO L226 Difference]: Without dead ends: 1012 [2022-03-15 20:57:50,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 220 SyntacticMatches, 49 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-15 20:57:50,942 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 109 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:57:50,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 1 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 20:57:50,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-03-15 20:57:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 620. [2022-03-15 20:57:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 5.670436187399031) internal successors, (3510), 619 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 3510 transitions. [2022-03-15 20:57:50,981 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 3510 transitions. Word has length 21 [2022-03-15 20:57:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:57:50,981 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 3510 transitions. [2022-03-15 20:57:50,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 3510 transitions. [2022-03-15 20:57:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 20:57:50,985 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:57:50,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:57:51,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 20:57:51,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:57:51,204 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:57:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:57:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash -566648929, now seen corresponding path program 1 times [2022-03-15 20:57:51,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:57:51,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116116595] [2022-03-15 20:57:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:57:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:57:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:57:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:51,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:57:51,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116116595] [2022-03-15 20:57:51,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116116595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:57:51,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833071457] [2022-03-15 20:57:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:57:51,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:57:51,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:57:51,260 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) [2022-03-15 20:57:51,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 20:57:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:57:51,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 20:57:51,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:57:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:51,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:57:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:51,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833071457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:57:51,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:57:51,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-03-15 20:57:51,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [560408046] [2022-03-15 20:57:51,373 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:57:51,390 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:57:51,425 INFO L252 McrAutomatonBuilder]: Finished intersection with 255 states and 801 transitions. [2022-03-15 20:57:51,425 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:57:54,267 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [4098#(or (not (< x6 n)) (< (* 2 x6) n) (< x5 n)), 4095#(< x6 n), 4096#(or (not (< x6 n)) (< (* 2 x6) n)), 4097#(or (< x6 n) (< x5 n))] [2022-03-15 20:57:54,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 20:57:54,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:57:54,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 20:57:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:57:54,269 INFO L87 Difference]: Start difference. First operand 620 states and 3510 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:54,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:57:54,480 INFO L93 Difference]: Finished difference Result 1659 states and 9313 transitions. [2022-03-15 20:57:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 20:57:54,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 20:57:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:57:54,491 INFO L225 Difference]: With dead ends: 1659 [2022-03-15 20:57:54,492 INFO L226 Difference]: Without dead ends: 1659 [2022-03-15 20:57:54,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 172 SyntacticMatches, 97 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-15 20:57:54,493 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 90 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:57:54,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 20:57:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-03-15 20:57:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1179. [2022-03-15 20:57:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 5.954159592529711) internal successors, (7014), 1178 states have internal predecessors, (7014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 7014 transitions. [2022-03-15 20:57:54,532 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 7014 transitions. Word has length 21 [2022-03-15 20:57:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:57:54,534 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 7014 transitions. [2022-03-15 20:57:54,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 7014 transitions. [2022-03-15 20:57:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 20:57:54,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:57:54,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:57:54,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 20:57:54,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-15 20:57:54,754 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:57:54,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:57:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1579464640, now seen corresponding path program 1 times [2022-03-15 20:57:54,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:57:54,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949539326] [2022-03-15 20:57:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:57:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:57:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:57:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:54,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:57:54,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949539326] [2022-03-15 20:57:54,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949539326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:57:54,800 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:57:54,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:57:54,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1403560776] [2022-03-15 20:57:54,800 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:57:54,801 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:57:54,832 INFO L252 McrAutomatonBuilder]: Finished intersection with 276 states and 886 transitions. [2022-03-15 20:57:54,832 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:57:57,187 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [8131#(or (= x4 x3) (< x3 n)), 8130#(< x3 n)] [2022-03-15 20:57:57,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 20:57:57,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:57:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 20:57:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:57:57,189 INFO L87 Difference]: Start difference. First operand 1179 states and 7014 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:57:57,311 INFO L93 Difference]: Finished difference Result 2536 states and 14751 transitions. [2022-03-15 20:57:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:57:57,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 20:57:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:57:57,329 INFO L225 Difference]: With dead ends: 2536 [2022-03-15 20:57:57,329 INFO L226 Difference]: Without dead ends: 2529 [2022-03-15 20:57:57,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 209 SyntacticMatches, 44 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:57:57,330 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 40 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:57:57,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:57:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-03-15 20:57:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2291. [2022-03-15 20:57:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 6.011353711790393) internal successors, (13766), 2290 states have internal predecessors, (13766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 13766 transitions. [2022-03-15 20:57:57,403 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 13766 transitions. Word has length 21 [2022-03-15 20:57:57,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:57:57,403 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 13766 transitions. [2022-03-15 20:57:57,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:57:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 13766 transitions. [2022-03-15 20:57:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 20:57:57,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:57:57,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:57:57,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 20:57:57,418 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:57:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:57:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash -759279618, now seen corresponding path program 1 times [2022-03-15 20:57:57,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:57:57,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180046061] [2022-03-15 20:57:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:57:57,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:57:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:57:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:57,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:57:57,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180046061] [2022-03-15 20:57:57,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180046061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:57:57,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921708048] [2022-03-15 20:57:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:57:57,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:57:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:57:57,480 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) [2022-03-15 20:57:57,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 20:57:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:57:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 20:57:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:57:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:57,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:57:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:57:57,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921708048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:57:57,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:57:57,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-03-15 20:57:57,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2086298886] [2022-03-15 20:57:57,581 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:57:57,582 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:57:57,609 INFO L252 McrAutomatonBuilder]: Finished intersection with 276 states and 886 transitions. [2022-03-15 20:57:57,609 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:58:00,973 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [15376#(or (< (* 2 x3) n) (not (< x3 n))), 15377#(or (<= (+ x4 1) n) (< x3 n)), 15378#(or (<= (+ x4 1) n) (< (* 2 x3) n) (not (< x3 n))), 15375#(< x3 n)] [2022-03-15 20:58:00,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 20:58:00,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:58:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 20:58:00,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:58:00,974 INFO L87 Difference]: Start difference. First operand 2291 states and 13766 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:58:01,140 INFO L93 Difference]: Finished difference Result 3002 states and 17644 transitions. [2022-03-15 20:58:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 20:58:01,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 20:58:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:58:01,160 INFO L225 Difference]: With dead ends: 3002 [2022-03-15 20:58:01,161 INFO L226 Difference]: Without dead ends: 3002 [2022-03-15 20:58:01,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 241 SyntacticMatches, 49 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-15 20:58:01,161 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:58:01,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:58:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2022-03-15 20:58:01,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2764. [2022-03-15 20:58:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 6.040535649656171) internal successors, (16690), 2763 states have internal predecessors, (16690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 16690 transitions. [2022-03-15 20:58:01,242 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 16690 transitions. Word has length 21 [2022-03-15 20:58:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:58:01,242 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 16690 transitions. [2022-03-15 20:58:01,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 16690 transitions. [2022-03-15 20:58:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 20:58:01,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:58:01,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:58:01,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-15 20:58:01,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:01,467 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:58:01,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:58:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1585737103, now seen corresponding path program 1 times [2022-03-15 20:58:01,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:58:01,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521523081] [2022-03-15 20:58:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:58:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:01,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:58:01,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521523081] [2022-03-15 20:58:01,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521523081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:58:01,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116430698] [2022-03-15 20:58:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:01,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:01,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:58:01,545 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) [2022-03-15 20:58:01,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 20:58:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:01,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 20:58:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:58:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:01,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:58:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:01,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116430698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:58:01,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:58:01,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 2] total 3 [2022-03-15 20:58:01,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [249721378] [2022-03-15 20:58:01,968 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:58:01,969 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:58:02,008 INFO L252 McrAutomatonBuilder]: Finished intersection with 364 states and 1212 transitions. [2022-03-15 20:58:02,009 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:58:10,986 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24044#(and (= x4 x3) (= x6 x5) (= (* 2 x1) x2))] [2022-03-15 20:58:10,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 20:58:10,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:58:10,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 20:58:10,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:58:10,988 INFO L87 Difference]: Start difference. First operand 2764 states and 16690 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:58:11,137 INFO L93 Difference]: Finished difference Result 3547 states and 20587 transitions. [2022-03-15 20:58:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:58:11,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 20:58:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:58:11,164 INFO L225 Difference]: With dead ends: 3547 [2022-03-15 20:58:11,165 INFO L226 Difference]: Without dead ends: 3533 [2022-03-15 20:58:11,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 132 SyntacticMatches, 250 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:58:11,165 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 15 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:58:11,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:58:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2022-03-15 20:58:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 3128. [2022-03-15 20:58:11,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 6.036136872401663) internal successors, (18875), 3127 states have internal predecessors, (18875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 18875 transitions. [2022-03-15 20:58:11,257 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 18875 transitions. Word has length 22 [2022-03-15 20:58:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:58:11,257 INFO L470 AbstractCegarLoop]: Abstraction has 3128 states and 18875 transitions. [2022-03-15 20:58:11,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 18875 transitions. [2022-03-15 20:58:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 20:58:11,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:58:11,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:58:11,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 20:58:11,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:11,486 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:58:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:58:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash -840174262, now seen corresponding path program 1 times [2022-03-15 20:58:11,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:58:11,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719689073] [2022-03-15 20:58:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:58:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:11,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:58:11,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719689073] [2022-03-15 20:58:11,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719689073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:58:11,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589084207] [2022-03-15 20:58:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:11,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:11,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:58:11,532 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) [2022-03-15 20:58:11,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 20:58:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 20:58:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:58:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:11,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:58:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:11,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589084207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:58:11,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:58:11,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 2] total 3 [2022-03-15 20:58:11,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [913284741] [2022-03-15 20:58:11,879 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:58:11,881 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:58:11,920 INFO L252 McrAutomatonBuilder]: Finished intersection with 364 states and 1212 transitions. [2022-03-15 20:58:11,920 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:58:23,497 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33979#(and (= (+ x5 (* (- 2) x6)) 0) (= x4 x3) (= x2 x1))] [2022-03-15 20:58:23,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 20:58:23,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:58:23,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 20:58:23,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:58:23,498 INFO L87 Difference]: Start difference. First operand 3128 states and 18875 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:58:23,626 INFO L93 Difference]: Finished difference Result 3804 states and 22147 transitions. [2022-03-15 20:58:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:58:23,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 20:58:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:58:23,643 INFO L225 Difference]: With dead ends: 3804 [2022-03-15 20:58:23,643 INFO L226 Difference]: Without dead ends: 3790 [2022-03-15 20:58:23,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 42 SyntacticMatches, 340 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:58:23,645 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:58:23,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:58:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-15 20:58:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 3456. [2022-03-15 20:58:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3456 states, 3455 states have (on average 6.055282199710565) internal successors, (20921), 3455 states have internal predecessors, (20921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3456 states to 3456 states and 20921 transitions. [2022-03-15 20:58:23,751 INFO L78 Accepts]: Start accepts. Automaton has 3456 states and 20921 transitions. Word has length 22 [2022-03-15 20:58:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:58:23,752 INFO L470 AbstractCegarLoop]: Abstraction has 3456 states and 20921 transitions. [2022-03-15 20:58:23,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3456 states and 20921 transitions. [2022-03-15 20:58:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 20:58:23,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:58:23,766 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:58:23,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 20:58:23,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:23,982 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:58:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:58:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash -942025258, now seen corresponding path program 1 times [2022-03-15 20:58:23,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:58:23,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598509138] [2022-03-15 20:58:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:23,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:58:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:58:24,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:58:24,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598509138] [2022-03-15 20:58:24,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598509138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:58:24,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:58:24,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:58:24,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [215656361] [2022-03-15 20:58:24,006 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:58:24,007 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:58:24,046 INFO L252 McrAutomatonBuilder]: Finished intersection with 348 states and 1148 transitions. [2022-03-15 20:58:24,046 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:58:26,026 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [44700#(< x6 n), 44701#(or (= x6 x5) (< x6 n))] [2022-03-15 20:58:26,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 20:58:26,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:58:26,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 20:58:26,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:58:26,028 INFO L87 Difference]: Start difference. First operand 3456 states and 20921 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:58:26,129 INFO L93 Difference]: Finished difference Result 3715 states and 21329 transitions. [2022-03-15 20:58:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:58:26,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 20:58:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:58:26,144 INFO L225 Difference]: With dead ends: 3715 [2022-03-15 20:58:26,144 INFO L226 Difference]: Without dead ends: 3687 [2022-03-15 20:58:26,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 246 SyntacticMatches, 78 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:58:26,145 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:58:26,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:58:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2022-03-15 20:58:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3425. [2022-03-15 20:58:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 3424 states have (on average 5.909170560747664) internal successors, (20233), 3424 states have internal predecessors, (20233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 20233 transitions. [2022-03-15 20:58:26,238 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 20233 transitions. Word has length 22 [2022-03-15 20:58:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:58:26,238 INFO L470 AbstractCegarLoop]: Abstraction has 3425 states and 20233 transitions. [2022-03-15 20:58:26,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 20233 transitions. [2022-03-15 20:58:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 20:58:26,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:58:26,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:58:26,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-15 20:58:26,249 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:58:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:58:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1899589142, now seen corresponding path program 1 times [2022-03-15 20:58:26,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:58:26,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189435555] [2022-03-15 20:58:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:58:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:26,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:58:26,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189435555] [2022-03-15 20:58:26,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189435555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:58:26,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263270381] [2022-03-15 20:58:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:26,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:26,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:58:26,343 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) [2022-03-15 20:58:26,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 20:58:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 20:58:26,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:58:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:26,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:58:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:26,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263270381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:58:26,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:58:26,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 2] total 3 [2022-03-15 20:58:26,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1064580953] [2022-03-15 20:58:26,725 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:58:26,726 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:58:26,769 INFO L252 McrAutomatonBuilder]: Finished intersection with 400 states and 1362 transitions. [2022-03-15 20:58:26,770 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:58:39,046 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55398#(and (= x6 x5) (= (+ (* (- 1) x4) (* 2 x3)) 0) (= x2 x1))] [2022-03-15 20:58:39,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 20:58:39,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:58:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 20:58:39,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:58:39,048 INFO L87 Difference]: Start difference. First operand 3425 states and 20233 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:58:39,187 INFO L93 Difference]: Finished difference Result 4170 states and 24035 transitions. [2022-03-15 20:58:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:58:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 20:58:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:58:39,203 INFO L225 Difference]: With dead ends: 4170 [2022-03-15 20:58:39,204 INFO L226 Difference]: Without dead ends: 4151 [2022-03-15 20:58:39,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 72 SyntacticMatches, 346 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:58:39,205 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 11 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:58:39,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:58:39,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2022-03-15 20:58:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3888. [2022-03-15 20:58:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 5.916645227682017) internal successors, (22998), 3887 states have internal predecessors, (22998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 22998 transitions. [2022-03-15 20:58:39,305 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 22998 transitions. Word has length 22 [2022-03-15 20:58:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:58:39,306 INFO L470 AbstractCegarLoop]: Abstraction has 3888 states and 22998 transitions. [2022-03-15 20:58:39,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 22998 transitions. [2022-03-15 20:58:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 20:58:39,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:58:39,317 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:58:39,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 20:58:39,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:39,525 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:58:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:58:39,526 INFO L85 PathProgramCache]: Analyzing trace with hash -413432746, now seen corresponding path program 1 times [2022-03-15 20:58:39,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:58:39,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262216109] [2022-03-15 20:58:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:39,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:58:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:58:39,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:58:39,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262216109] [2022-03-15 20:58:39,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262216109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:58:39,546 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:58:39,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:58:39,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1389920945] [2022-03-15 20:58:39,548 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:58:39,549 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:58:39,585 INFO L252 McrAutomatonBuilder]: Finished intersection with 348 states and 1148 transitions. [2022-03-15 20:58:39,585 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:58:43,725 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [67350#(< x2 n), 67352#(or (< (* 2 x2) n) (not (< x2 n))), 67356#(or (< x1 n) (= x2 x1)), 67351#(or (< x1 n) (< x2 n)), 67353#(or (< (* 2 x2) n) (< x1 n) (not (< x2 n))), 67355#(or (< x1 n) (< (* x2 4) n) (<= n (* 2 x2))), 67354#(or (< (* x2 4) n) (<= n (* 2 x2))), 67349#(< x1 n)] [2022-03-15 20:58:43,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 20:58:43,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:58:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 20:58:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-15 20:58:43,727 INFO L87 Difference]: Start difference. First operand 3888 states and 22998 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:58:44,024 INFO L93 Difference]: Finished difference Result 6049 states and 34350 transitions. [2022-03-15 20:58:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 20:58:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 20:58:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:58:44,045 INFO L225 Difference]: With dead ends: 6049 [2022-03-15 20:58:44,045 INFO L226 Difference]: Without dead ends: 6016 [2022-03-15 20:58:44,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 259 SyntacticMatches, 59 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-03-15 20:58:44,046 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 204 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:58:44,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 20:58:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2022-03-15 20:58:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 4987. [2022-03-15 20:58:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4987 states, 4986 states have (on average 5.899719213798636) internal successors, (29416), 4986 states have internal predecessors, (29416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4987 states to 4987 states and 29416 transitions. [2022-03-15 20:58:44,186 INFO L78 Accepts]: Start accepts. Automaton has 4987 states and 29416 transitions. Word has length 22 [2022-03-15 20:58:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:58:44,186 INFO L470 AbstractCegarLoop]: Abstraction has 4987 states and 29416 transitions. [2022-03-15 20:58:44,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4987 states and 29416 transitions. [2022-03-15 20:58:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 20:58:44,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:58:44,199 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:58:44,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-15 20:58:44,200 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:58:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:58:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1859639510, now seen corresponding path program 2 times [2022-03-15 20:58:44,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:58:44,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410605079] [2022-03-15 20:58:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:58:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:44,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:58:44,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410605079] [2022-03-15 20:58:44,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410605079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:58:44,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072930084] [2022-03-15 20:58:44,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 20:58:44,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:44,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:58:44,242 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) [2022-03-15 20:58:44,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 20:58:44,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 20:58:44,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:58:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 20:58:44,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:58:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:44,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:58:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:44,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072930084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:58:44,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:58:44,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 20:58:44,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1075546063] [2022-03-15 20:58:44,367 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:58:44,368 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:58:44,423 INFO L252 McrAutomatonBuilder]: Finished intersection with 458 states and 1561 transitions. [2022-03-15 20:58:44,423 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:58:53,309 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [83535#(or (< (* 2 x2) n) (< x1 n) (not (< x2 n))), 83533#(or (< (* x1 4) n) (<= n (* 2 x1))), 83536#(or (not (< x1 n)) (< (* 2 x2) n) (not (< x2 n)) (< (* 2 x1) n)), 83534#(or (< (* x1 4) n) (< x2 n) (<= n (* 2 x1))), 83538#(or (< x1 n) (<= (+ (* 2 x2) 1) n)), 83532#(or (not (< x2 n)) (<= (+ (* 2 x2) 1) n)), 83530#(or (< x1 n) (< x2 n)), 83539#(or (not (< x1 n)) (<= (+ (* 2 x2) 1) n) (< (* 2 x1) n)), 83528#(< x1 n), 83529#(or (not (< x1 n)) (< (* 2 x1) n)), 83531#(or (not (< x1 n)) (< x2 n) (< (* 2 x1) n)), 83540#(or (< (* x1 4) n) (<= n (* 2 x1)) (<= (+ (* 2 x2) 1) n)), 83537#(or (< (* x1 4) n) (< (* 2 x2) n) (<= n x2) (<= n (* 2 x1)))] [2022-03-15 20:58:53,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 20:58:53,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:58:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 20:58:53,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-15 20:58:53,310 INFO L87 Difference]: Start difference. First operand 4987 states and 29416 transitions. Second operand has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:58:54,101 INFO L93 Difference]: Finished difference Result 9549 states and 56390 transitions. [2022-03-15 20:58:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 20:58:54,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 20:58:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:58:54,136 INFO L225 Difference]: With dead ends: 9549 [2022-03-15 20:58:54,136 INFO L226 Difference]: Without dead ends: 9549 [2022-03-15 20:58:54,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 319 SyntacticMatches, 145 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=338, Invalid=1222, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 20:58:54,137 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 572 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 20:58:54,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 1 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 20:58:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2022-03-15 20:58:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 7525. [2022-03-15 20:58:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7525 states, 7524 states have (on average 6.154306220095694) internal successors, (46305), 7524 states have internal predecessors, (46305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7525 states to 7525 states and 46305 transitions. [2022-03-15 20:58:54,342 INFO L78 Accepts]: Start accepts. Automaton has 7525 states and 46305 transitions. Word has length 23 [2022-03-15 20:58:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:58:54,343 INFO L470 AbstractCegarLoop]: Abstraction has 7525 states and 46305 transitions. [2022-03-15 20:58:54,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:58:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7525 states and 46305 transitions. [2022-03-15 20:58:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 20:58:54,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:58:54,364 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:58:54,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 20:58:54,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:54,587 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:58:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:58:54,587 INFO L85 PathProgramCache]: Analyzing trace with hash -184383917, now seen corresponding path program 2 times [2022-03-15 20:58:54,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:58:54,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140315385] [2022-03-15 20:58:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:58:54,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:58:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:58:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:54,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:58:54,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140315385] [2022-03-15 20:58:54,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140315385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:58:54,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889813883] [2022-03-15 20:58:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 20:58:54,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:58:54,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:58:54,612 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) [2022-03-15 20:58:54,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 20:58:54,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 20:58:54,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:58:54,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 20:58:54,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:58:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:54,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:58:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:58:54,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889813883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:58:54,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:58:54,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 20:58:54,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [282549847] [2022-03-15 20:58:54,712 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:58:54,713 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:58:54,764 INFO L252 McrAutomatonBuilder]: Finished intersection with 458 states and 1561 transitions. [2022-03-15 20:58:54,764 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:59:01,551 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [108318#(< x6 n), 108326#(or (<= (+ (* 2 x5) 1) n) (< (* x6 4) n) (<= n (* 2 x6))), 108325#(or (< (* x6 4) n) (<= n (* 2 x6)) (< x5 n)), 108320#(or (<= (+ (* 2 x5) 1) n) (< x6 n)), 108323#(or (<= (+ (* 2 x5) 1) n) (not (< x6 n)) (< (* 2 x6) n)), 108324#(or (< (* x6 4) n) (<= n (* 2 x6))), 108322#(or (not (< x6 n)) (< (* 2 x6) n) (< x5 n)), 108321#(or (not (< x6 n)) (< (* 2 x6) n)), 108319#(or (< x6 n) (< x5 n))] [2022-03-15 20:59:01,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 20:59:01,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:59:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 20:59:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-15 20:59:01,558 INFO L87 Difference]: Start difference. First operand 7525 states and 46305 transitions. Second operand has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:59:02,252 INFO L93 Difference]: Finished difference Result 16131 states and 103501 transitions. [2022-03-15 20:59:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 20:59:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 20:59:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:59:02,325 INFO L225 Difference]: With dead ends: 16131 [2022-03-15 20:59:02,325 INFO L226 Difference]: Without dead ends: 16131 [2022-03-15 20:59:02,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 350 SyntacticMatches, 118 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-03-15 20:59:02,326 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 251 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 20:59:02,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 20:59:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16131 states. [2022-03-15 20:59:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16131 to 14364. [2022-03-15 20:59:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14364 states, 14363 states have (on average 6.6052356749982595) internal successors, (94871), 14363 states have internal predecessors, (94871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14364 states to 14364 states and 94871 transitions. [2022-03-15 20:59:02,922 INFO L78 Accepts]: Start accepts. Automaton has 14364 states and 94871 transitions. Word has length 23 [2022-03-15 20:59:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:59:02,931 INFO L470 AbstractCegarLoop]: Abstraction has 14364 states and 94871 transitions. [2022-03-15 20:59:02,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 14364 states and 94871 transitions. [2022-03-15 20:59:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 20:59:02,979 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:59:02,979 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:59:02,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 20:59:03,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 20:59:03,194 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:59:03,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:59:03,195 INFO L85 PathProgramCache]: Analyzing trace with hash -286234913, now seen corresponding path program 3 times [2022-03-15 20:59:03,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:59:03,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952728102] [2022-03-15 20:59:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:59:03,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:59:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:59:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:03,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:59:03,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952728102] [2022-03-15 20:59:03,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952728102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:59:03,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303781545] [2022-03-15 20:59:03,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 20:59:03,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:59:03,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:59:03,311 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) [2022-03-15 20:59:03,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 20:59:03,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 20:59:03,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:59:03,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 20:59:03,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:59:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:03,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:59:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:03,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303781545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:59:03,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:59:03,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 20:59:03,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1124429840] [2022-03-15 20:59:03,415 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:59:03,417 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:59:03,504 INFO L252 McrAutomatonBuilder]: Finished intersection with 473 states and 1623 transitions. [2022-03-15 20:59:03,505 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:59:08,845 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [153355#(or (<= n x5) (< (* 2 x6) n) (<= n x6)), 153356#(or (< x6 n) (<= n (* 2 x5))), 153357#(or (< (* 2 x6) n) (<= n (* 2 x5)) (<= n x6)), 153354#(or (not (< x6 n)) (< (* 2 x6) n)), 153353#(or (<= n x5) (< x6 n)), 153352#(< x6 n)] [2022-03-15 20:59:08,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 20:59:08,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:59:08,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 20:59:08,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-15 20:59:08,846 INFO L87 Difference]: Start difference. First operand 14364 states and 94871 transitions. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 11 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:59:09,516 INFO L93 Difference]: Finished difference Result 21550 states and 133241 transitions. [2022-03-15 20:59:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 20:59:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 11 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 20:59:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:59:09,613 INFO L225 Difference]: With dead ends: 21550 [2022-03-15 20:59:09,614 INFO L226 Difference]: Without dead ends: 21466 [2022-03-15 20:59:09,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 399 SyntacticMatches, 87 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2022-03-15 20:59:09,614 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 305 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 20:59:09,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 1 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 20:59:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21466 states. [2022-03-15 20:59:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21466 to 14421. [2022-03-15 20:59:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14421 states, 14420 states have (on average 6.5389736477115115) internal successors, (94292), 14420 states have internal predecessors, (94292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14421 states to 14421 states and 94292 transitions. [2022-03-15 20:59:10,255 INFO L78 Accepts]: Start accepts. Automaton has 14421 states and 94292 transitions. Word has length 23 [2022-03-15 20:59:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:59:10,255 INFO L470 AbstractCegarLoop]: Abstraction has 14421 states and 94292 transitions. [2022-03-15 20:59:10,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 11 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 14421 states and 94292 transitions. [2022-03-15 20:59:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 20:59:10,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:59:10,305 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:59:10,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-15 20:59:10,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 20:59:10,512 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:59:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:59:10,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1350361670, now seen corresponding path program 2 times [2022-03-15 20:59:10,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:59:10,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042096978] [2022-03-15 20:59:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:59:10,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:59:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:59:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:10,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:59:10,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042096978] [2022-03-15 20:59:10,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042096978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:59:10,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904322320] [2022-03-15 20:59:10,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 20:59:10,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:59:10,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:59:10,558 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) [2022-03-15 20:59:10,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 20:59:10,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 20:59:10,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:59:10,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 20:59:10,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:59:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:10,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:59:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:10,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904322320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:59:10,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:59:10,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 20:59:10,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1696943610] [2022-03-15 20:59:10,696 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:59:10,697 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:59:10,762 INFO L252 McrAutomatonBuilder]: Finished intersection with 524 states and 1838 transitions. [2022-03-15 20:59:10,762 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:59:15,477 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [203924#(< x3 n), 203929#(or (<= n (* 2 x4)) (< (* 2 x3) n) (not (< x3 n))), 203925#(or (<= n x4) (< x3 n)), 203926#(or (< (* 2 x3) n) (not (< x3 n))), 203927#(or (<= n x4) (< (* 2 x3) n) (not (< x3 n))), 203928#(or (<= n (* 2 x4)) (< x3 n))] [2022-03-15 20:59:15,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 20:59:15,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:59:15,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 20:59:15,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-15 20:59:15,478 INFO L87 Difference]: Start difference. First operand 14421 states and 94292 transitions. Second operand has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:59:16,352 INFO L93 Difference]: Finished difference Result 39446 states and 257716 transitions. [2022-03-15 20:59:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 20:59:16,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 20:59:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:59:16,782 INFO L225 Difference]: With dead ends: 39446 [2022-03-15 20:59:16,782 INFO L226 Difference]: Without dead ends: 39374 [2022-03-15 20:59:16,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 523 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2022-03-15 20:59:16,782 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 246 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 20:59:16,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 1 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 20:59:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39374 states. [2022-03-15 20:59:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39374 to 25145. [2022-03-15 20:59:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25145 states, 25144 states have (on average 6.916162901686287) internal successors, (173900), 25144 states have internal predecessors, (173900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25145 states to 25145 states and 173900 transitions. [2022-03-15 20:59:18,283 INFO L78 Accepts]: Start accepts. Automaton has 25145 states and 173900 transitions. Word has length 23 [2022-03-15 20:59:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:59:18,283 INFO L470 AbstractCegarLoop]: Abstraction has 25145 states and 173900 transitions. [2022-03-15 20:59:18,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 25145 states and 173900 transitions. [2022-03-15 20:59:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 20:59:18,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:59:18,371 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:59:18,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 20:59:18,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 20:59:18,582 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:59:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:59:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash -867340036, now seen corresponding path program 3 times [2022-03-15 20:59:18,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:59:18,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866304442] [2022-03-15 20:59:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:59:18,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:59:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:59:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:18,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:59:18,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866304442] [2022-03-15 20:59:18,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866304442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:59:18,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315297501] [2022-03-15 20:59:18,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 20:59:18,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:59:18,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:59:18,646 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) [2022-03-15 20:59:18,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 20:59:18,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 20:59:18,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:59:18,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 20:59:18,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:59:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:18,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:59:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:18,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315297501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:59:18,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:59:18,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 20:59:18,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [198837914] [2022-03-15 20:59:18,793 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:59:18,794 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:59:18,945 INFO L252 McrAutomatonBuilder]: Finished intersection with 524 states and 1838 transitions. [2022-03-15 20:59:18,945 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:59:25,143 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [293846#(or (< x3 n) (<= (+ (* 2 x4) 1) n)), 293840#(< x3 n), 293843#(or (<= (+ x4 1) n) (< (* 2 x3) n) (not (< x3 n))), 293841#(or (<= (+ x4 1) n) (< x3 n)), 293848#(or (<= n (* 2 x3)) (<= (+ (* 2 x4) 1) n) (< (* x3 4) n)), 293842#(or (< (* 2 x3) n) (not (< x3 n))), 293844#(or (<= n (* 2 x3)) (< (* x3 4) n)), 293845#(or (<= (+ x4 1) n) (<= n (* 2 x3)) (< (* x3 4) n)), 293847#(or (< (* 2 x3) n) (<= (+ (* 2 x4) 1) n) (not (< x3 n)))] [2022-03-15 20:59:25,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 20:59:25,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:59:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 20:59:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-15 20:59:25,144 INFO L87 Difference]: Start difference. First operand 25145 states and 173900 transitions. Second operand has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 14 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:59:26,118 INFO L93 Difference]: Finished difference Result 43946 states and 294215 transitions. [2022-03-15 20:59:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 20:59:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 14 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 20:59:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:59:26,581 INFO L225 Difference]: With dead ends: 43946 [2022-03-15 20:59:26,581 INFO L226 Difference]: Without dead ends: 43922 [2022-03-15 20:59:26,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 431 SyntacticMatches, 103 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-03-15 20:59:26,582 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 301 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 20:59:26,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 1 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 20:59:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43922 states. [2022-03-15 20:59:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43922 to 32198. [2022-03-15 20:59:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32198 states, 32197 states have (on average 6.973040966549679) internal successors, (224511), 32197 states have internal predecessors, (224511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32198 states to 32198 states and 224511 transitions. [2022-03-15 20:59:28,012 INFO L78 Accepts]: Start accepts. Automaton has 32198 states and 224511 transitions. Word has length 23 [2022-03-15 20:59:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:59:28,013 INFO L470 AbstractCegarLoop]: Abstraction has 32198 states and 224511 transitions. [2022-03-15 20:59:28,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 14 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 32198 states and 224511 transitions. [2022-03-15 20:59:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 20:59:28,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:59:28,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:59:28,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-15 20:59:28,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 20:59:28,568 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:59:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:59:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1830530826, now seen corresponding path program 3 times [2022-03-15 20:59:28,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:59:28,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27670769] [2022-03-15 20:59:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:59:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:59:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:59:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:28,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:59:28,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27670769] [2022-03-15 20:59:28,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27670769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:59:28,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078130623] [2022-03-15 20:59:28,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 20:59:28,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:59:28,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:59:28,629 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) [2022-03-15 20:59:28,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 20:59:28,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 20:59:28,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:59:28,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 20:59:28,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:59:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:28,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:59:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:29,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078130623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:59:29,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:59:29,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 3] total 5 [2022-03-15 20:59:29,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1530840225] [2022-03-15 20:59:29,125 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:59:29,127 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:59:29,287 INFO L252 McrAutomatonBuilder]: Finished intersection with 598 states and 2098 transitions. [2022-03-15 20:59:29,287 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:59:45,017 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [402362#(and (= x4 x3) (= x6 x5) (= (* 2 x1) x2)), 402363#(and (= x4 x3) (= x6 x5) (= x2 (* x1 4)))] [2022-03-15 20:59:45,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 20:59:45,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:59:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 20:59:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:59:45,018 INFO L87 Difference]: Start difference. First operand 32198 states and 224511 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:59:45,604 INFO L93 Difference]: Finished difference Result 33805 states and 231781 transitions. [2022-03-15 20:59:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 20:59:45,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 20:59:45,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:59:45,799 INFO L225 Difference]: With dead ends: 33805 [2022-03-15 20:59:45,799 INFO L226 Difference]: Without dead ends: 33763 [2022-03-15 20:59:45,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 302 SyntacticMatches, 315 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:59:45,804 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 30 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:59:45,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 20:59:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33763 states. [2022-03-15 20:59:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33763 to 32530. [2022-03-15 20:59:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32530 states, 32529 states have (on average 6.95975898429094) internal successors, (226394), 32529 states have internal predecessors, (226394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32530 states to 32530 states and 226394 transitions. [2022-03-15 20:59:47,033 INFO L78 Accepts]: Start accepts. Automaton has 32530 states and 226394 transitions. Word has length 24 [2022-03-15 20:59:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:59:47,033 INFO L470 AbstractCegarLoop]: Abstraction has 32530 states and 226394 transitions. [2022-03-15 20:59:47,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:59:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32530 states and 226394 transitions. [2022-03-15 20:59:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 20:59:47,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:59:47,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:59:47,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 20:59:47,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 20:59:47,396 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 20:59:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:59:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash -275575643, now seen corresponding path program 1 times [2022-03-15 20:59:47,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:59:47,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120573209] [2022-03-15 20:59:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:59:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:59:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:59:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:47,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:59:47,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120573209] [2022-03-15 20:59:47,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120573209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:59:47,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585767060] [2022-03-15 20:59:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:59:47,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:59:47,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:59:47,518 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) [2022-03-15 20:59:47,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 20:59:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:59:47,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 20:59:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:59:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:47,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:59:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:59:48,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585767060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:59:48,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:59:48,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 3] total 6 [2022-03-15 20:59:48,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [270456719] [2022-03-15 20:59:48,043 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:59:48,045 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:59:48,141 INFO L252 McrAutomatonBuilder]: Finished intersection with 676 states and 2450 transitions. [2022-03-15 20:59:48,141 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:00:12,445 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [501375#(and (= (+ x5 (* (- 2) x6)) 0) (= x4 x3) (= (+ x1 (* (- 1) x2)) 0)), 501379#(and (= x4 x3) (= x1 (* 2 x2)) (= (* 2 x6) x5)), 501380#(and (= x4 x3) (= (* 2 x1) x2) (= (* 2 x6) x5)), 501378#(and (= x4 x3) (= (* 2 x1) x2) (= (* 2 x5) x6)), 501376#(and (= x4 x3) (= (+ x5 (* (- 1) x6)) 0) (= (* 2 x1) x2)), 501377#(and (= x4 x3) (<= (* 2 x2) x1) (<= x1 (* 2 x2)) (= (* 2 x5) x6))] [2022-03-15 21:00:12,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:00:12,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:00:12,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:00:12,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:00:12,447 INFO L87 Difference]: Start difference. First operand 32530 states and 226394 transitions. Second operand has 11 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:00:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:00:13,631 INFO L93 Difference]: Finished difference Result 38652 states and 259176 transitions. [2022-03-15 21:00:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:00:13,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:00:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:00:13,864 INFO L225 Difference]: With dead ends: 38652 [2022-03-15 21:00:13,864 INFO L226 Difference]: Without dead ends: 38614 [2022-03-15 21:00:13,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 149 SyntacticMatches, 541 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:00:13,865 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:00:13,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:00:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38614 states. [2022-03-15 21:00:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38614 to 34879. [2022-03-15 21:00:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34879 states, 34878 states have (on average 6.942141177819829) internal successors, (242128), 34878 states have internal predecessors, (242128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:00:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34879 states to 34879 states and 242128 transitions. [2022-03-15 21:00:15,618 INFO L78 Accepts]: Start accepts. Automaton has 34879 states and 242128 transitions. Word has length 24 [2022-03-15 21:00:15,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:00:15,618 INFO L470 AbstractCegarLoop]: Abstraction has 34879 states and 242128 transitions. [2022-03-15 21:00:15,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:00:15,618 INFO L276 IsEmpty]: Start isEmpty. Operand 34879 states and 242128 transitions. [2022-03-15 21:00:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:00:15,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:00:15,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:00:15,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 21:00:15,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 21:00:15,959 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 21:00:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:00:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1830779535, now seen corresponding path program 1 times [2022-03-15 21:00:15,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:00:15,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491811809] [2022-03-15 21:00:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:00:15,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:00:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:00:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:00:16,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:00:16,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491811809] [2022-03-15 21:00:16,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491811809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:00:16,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066192554] [2022-03-15 21:00:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:00:16,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:00:16,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:00:16,053 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) [2022-03-15 21:00:16,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 21:00:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:00:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:00:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:00:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:00:16,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:00:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:00:16,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066192554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:00:16,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:00:16,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 3] total 6 [2022-03-15 21:00:16,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1221114272] [2022-03-15 21:00:16,565 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:00:16,566 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:00:16,798 INFO L252 McrAutomatonBuilder]: Finished intersection with 772 states and 2866 transitions. [2022-03-15 21:00:16,799 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:00:42,495 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [609942#(and (= x6 x5) (= (* 2 x3) x4) (= x1 (* 2 x2))), 609937#(and (= x6 x5) (= (+ x1 (* (- 1) x2)) 0) (= (+ (* (- 1) x4) (* 2 x3)) 0)), 609938#(and (= (+ (* (- 1) x4) x3) 0) (= x6 x5) (= (* 2 x1) x2)), 609940#(and (= x6 x5) (= (* 2 x1) x2) (= (* 2 x3) x4)), 609939#(and (= x6 x5) (= (* 2 x1) x2) (= (* 2 x4) x3)), 609941#(and (= x6 x5) (<= (* 2 x2) x1) (<= x1 (* 2 x2)) (= (* 2 x4) x3))] [2022-03-15 21:00:42,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:00:42,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:00:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:00:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:00:42,495 INFO L87 Difference]: Start difference. First operand 34879 states and 242128 transitions. Second operand has 11 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:00:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:00:43,652 INFO L93 Difference]: Finished difference Result 42777 states and 285830 transitions. [2022-03-15 21:00:43,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:00:43,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:00:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:00:43,909 INFO L225 Difference]: With dead ends: 42777 [2022-03-15 21:00:43,909 INFO L226 Difference]: Without dead ends: 42732 [2022-03-15 21:00:43,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 209 SyntacticMatches, 577 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:00:43,910 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 60 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:00:43,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1861 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:00:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42732 states. [2022-03-15 21:00:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42732 to 38056. [2022-03-15 21:00:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38056 states, 38055 states have (on average 6.937800551832874) internal successors, (264018), 38055 states have internal predecessors, (264018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:00:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38056 states to 38056 states and 264018 transitions. [2022-03-15 21:00:45,938 INFO L78 Accepts]: Start accepts. Automaton has 38056 states and 264018 transitions. Word has length 24 [2022-03-15 21:00:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:00:45,939 INFO L470 AbstractCegarLoop]: Abstraction has 38056 states and 264018 transitions. [2022-03-15 21:00:45,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:00:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 38056 states and 264018 transitions. [2022-03-15 21:00:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:00:46,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:00:46,093 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:00:46,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 21:00:46,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:00:46,310 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 21:00:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:00:46,314 INFO L85 PathProgramCache]: Analyzing trace with hash 151165873, now seen corresponding path program 4 times [2022-03-15 21:00:46,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:00:46,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741420812] [2022-03-15 21:00:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:00:46,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:00:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:00:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:00:46,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:00:46,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741420812] [2022-03-15 21:00:46,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741420812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:00:46,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259404759] [2022-03-15 21:00:46,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:00:46,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:00:46,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:00:46,354 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) [2022-03-15 21:00:46,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 21:00:46,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:00:46,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:00:46,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 21:00:46,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:00:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:00:46,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:00:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:00:46,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259404759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:00:46,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:00:46,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-15 21:00:46,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1818447995] [2022-03-15 21:00:46,780 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:00:46,781 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:00:46,853 INFO L252 McrAutomatonBuilder]: Finished intersection with 582 states and 2034 transitions. [2022-03-15 21:00:46,854 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:00:56,877 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 20 new interpolants: [728996#(or (<= n (* x2 4)) (< x1 n) (< (* x2 8) n)), 728984#(or (< x1 n) (< x2 n)), 728990#(or (< (* x2 4) n) (<= n (* 2 x2))), 728988#(or (not (< x1 n)) (< x2 n) (< (* 2 x1) n)), 729001#(or (<= (+ 2 n) (* x2 4)) (not (< x1 n)) (< (* 2 x1) n)), 728998#(or (not (< x1 n)) (< (* 2 x1) n) (<= (+ 2 n) x2)), 728994#(or (< x1 n) (<= (+ 2 n) x2)), 728991#(or (< x1 n) (< (* x2 4) n) (<= n (* 2 x2))), 728983#(< x1 n), 728989#(or (not (< x1 n)) (< (* 2 x2) n) (not (< x2 n)) (< (* 2 x1) n)), 728997#(or (<= n (* x2 4)) (<= n x1) (< (* 2 x1) n) (< (* x2 8) n)), 728992#(or (<= n x1) (< (* x2 4) n) (< (* 2 x1) n) (<= n (* 2 x2))), 728985#(or (< (* 2 x2) n) (not (< x2 n))), 728999#(or (<= (+ 2 n) (* x2 4)) (< x1 n)), 728993#(or (<= n (* x2 4)) (< (* x2 8) n)), 728982#(< x2 n), 729000#(or (<= (+ 2 n) (* 2 x2)) (not (< x1 n)) (< (* 2 x1) n)), 728986#(or (< (* 2 x2) n) (< x1 n) (not (< x2 n))), 728995#(or (<= (+ 2 n) (* 2 x2)) (< x1 n)), 728987#(or (not (< x1 n)) (< (* 2 x1) n))] [2022-03-15 21:00:56,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:00:56,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:00:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:00:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:00:56,878 INFO L87 Difference]: Start difference. First operand 38056 states and 264018 transitions. Second operand has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:00:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:00:59,495 INFO L93 Difference]: Finished difference Result 79484 states and 513435 transitions. [2022-03-15 21:00:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:00:59,495 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:00:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:01:00,116 INFO L225 Difference]: With dead ends: 79484 [2022-03-15 21:01:00,116 INFO L226 Difference]: Without dead ends: 79314 [2022-03-15 21:01:00,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 490 SyntacticMatches, 89 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=718, Invalid=2822, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:01:00,117 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 1275 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:01:00,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 1 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:01:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79314 states. [2022-03-15 21:01:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79314 to 41366. [2022-03-15 21:01:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41366 states, 41365 states have (on average 6.859349691768403) internal successors, (283737), 41365 states have internal predecessors, (283737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:01:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41366 states to 41366 states and 283737 transitions. [2022-03-15 21:01:02,824 INFO L78 Accepts]: Start accepts. Automaton has 41366 states and 283737 transitions. Word has length 24 [2022-03-15 21:01:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:01:02,824 INFO L470 AbstractCegarLoop]: Abstraction has 41366 states and 283737 transitions. [2022-03-15 21:01:02,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:01:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 41366 states and 283737 transitions. [2022-03-15 21:01:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:01:02,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:01:02,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:01:02,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 21:01:03,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:01:03,183 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 21:01:03,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:01:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1431570698, now seen corresponding path program 4 times [2022-03-15 21:01:03,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:01:03,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584079474] [2022-03-15 21:01:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:01:03,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:01:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:01:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:01:03,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:01:03,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584079474] [2022-03-15 21:01:03,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584079474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:01:03,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697146389] [2022-03-15 21:01:03,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:01:03,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:01:03,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:01:03,249 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) [2022-03-15 21:01:03,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 21:01:03,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:01:03,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:01:03,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:01:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:01:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:01:03,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:01:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:01:03,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697146389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:01:03,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:01:03,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 3] total 5 [2022-03-15 21:01:03,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1208788309] [2022-03-15 21:01:03,641 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:01:03,642 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:01:03,840 INFO L252 McrAutomatonBuilder]: Finished intersection with 598 states and 2098 transitions. [2022-03-15 21:01:03,840 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:01:28,892 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [891420#(and (= x4 x3) (= (+ x5 (* x6 (- 4))) 0) (= x2 x1)), 891419#(and (= (+ x5 (* (- 2) x6)) 0) (= x4 x3) (= x2 x1))] [2022-03-15 21:01:28,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:01:28,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:01:28,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:01:28,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:01:28,893 INFO L87 Difference]: Start difference. First operand 41366 states and 283737 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:01:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:01:29,667 INFO L93 Difference]: Finished difference Result 43122 states and 291893 transitions. [2022-03-15 21:01:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:01:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:01:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:01:29,949 INFO L225 Difference]: With dead ends: 43122 [2022-03-15 21:01:29,949 INFO L226 Difference]: Without dead ends: 43099 [2022-03-15 21:01:29,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 100 SyntacticMatches, 517 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:01:29,950 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:01:29,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 1 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:01:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43099 states. [2022-03-15 21:01:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43099 to 42108. [2022-03-15 21:01:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42108 states, 42107 states have (on average 6.837580449806445) internal successors, (287910), 42107 states have internal predecessors, (287910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:01:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42108 states to 42108 states and 287910 transitions. [2022-03-15 21:01:31,927 INFO L78 Accepts]: Start accepts. Automaton has 42108 states and 287910 transitions. Word has length 24 [2022-03-15 21:01:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:01:31,927 INFO L470 AbstractCegarLoop]: Abstraction has 42108 states and 287910 transitions. [2022-03-15 21:01:31,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:01:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 42108 states and 287910 transitions. [2022-03-15 21:01:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:01:32,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:01:32,326 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:01:32,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-15 21:01:32,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:01:32,543 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 21:01:32,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:01:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1677841966, now seen corresponding path program 5 times [2022-03-15 21:01:32,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:01:32,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554873650] [2022-03-15 21:01:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:01:32,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:01:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:01:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:01:32,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:01:32,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554873650] [2022-03-15 21:01:32,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554873650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:01:32,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450981297] [2022-03-15 21:01:32,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:01:32,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:01:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:01:32,609 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) [2022-03-15 21:01:32,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 21:01:32,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:01:32,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:01:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 21:01:32,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:01:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:01:32,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:01:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:01:32,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450981297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:01:32,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:01:32,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-03-15 21:01:32,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [369987321] [2022-03-15 21:01:32,765 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:01:32,766 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:01:32,838 INFO L252 McrAutomatonBuilder]: Finished intersection with 552 states and 1910 transitions. [2022-03-15 21:01:32,838 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:01:38,847 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1018914#(or (<= n (* x6 4)) (< (* x6 8) n)), 1018910#(< x6 n), 1018915#(or (<= (+ (* 2 x5) 2) (* 2 x6)) (not (< x5 n))), 1018912#(or (<= (+ (* 2 x5) 2) x6) (not (< x5 n))), 1018911#(or (not (< x6 n)) (< (* 2 x6) n)), 1018909#(or (<= (+ (* 2 x5) 3) n) (not (< x5 n))), 1018913#(or (< (* x6 4) n) (<= n (* 2 x6)))] [2022-03-15 21:01:38,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:01:38,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:01:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:01:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:01:38,848 INFO L87 Difference]: Start difference. First operand 42108 states and 287910 transitions. Second operand has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 13 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:01:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:01:42,948 INFO L93 Difference]: Finished difference Result 159132 states and 1045038 transitions. [2022-03-15 21:01:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 21:01:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 13 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:01:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:01:44,974 INFO L225 Difference]: With dead ends: 159132 [2022-03-15 21:01:44,974 INFO L226 Difference]: Without dead ends: 159132 [2022-03-15 21:01:44,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 479 SyntacticMatches, 83 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2069 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=940, Invalid=4912, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:01:44,976 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 677 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:01:44,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 1 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:01:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159132 states. [2022-03-15 21:01:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159132 to 70509. [2022-03-15 21:01:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70509 states, 70508 states have (on average 7.106881488625405) internal successors, (501092), 70508 states have internal predecessors, (501092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:01:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70509 states to 70509 states and 501092 transitions. [2022-03-15 21:01:51,147 INFO L78 Accepts]: Start accepts. Automaton has 70509 states and 501092 transitions. Word has length 24 [2022-03-15 21:01:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:01:51,148 INFO L470 AbstractCegarLoop]: Abstraction has 70509 states and 501092 transitions. [2022-03-15 21:01:51,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 13 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:01:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 70509 states and 501092 transitions. [2022-03-15 21:01:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:01:51,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:01:51,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:01:51,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 21:01:51,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:01:51,749 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 21:01:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:01:51,749 INFO L85 PathProgramCache]: Analyzing trace with hash 772578058, now seen corresponding path program 1 times [2022-03-15 21:01:51,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:01:51,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636600128] [2022-03-15 21:01:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:01:51,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:01:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:01:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:01:51,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:01:51,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636600128] [2022-03-15 21:01:51,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636600128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:01:51,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183034468] [2022-03-15 21:01:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:01:51,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:01:51,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:01:51,846 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) [2022-03-15 21:01:51,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 21:01:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:01:51,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:01:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:01:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:01:52,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:01:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:01:52,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183034468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:01:52,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:01:52,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 6 [2022-03-15 21:01:52,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [585372230] [2022-03-15 21:01:52,332 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:01:52,334 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:01:52,617 INFO L252 McrAutomatonBuilder]: Finished intersection with 772 states and 2866 transitions. [2022-03-15 21:01:52,617 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:02:22,211 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1319328#(and (= (+ x5 (* (- 2) x6)) 0) (= x4 x3) (= x2 x1)), 1319331#(and (= (* 2 x3) x4) (= x2 x1) (= (* 2 x6) x5)), 1319332#(and (= (* 2 x3) x4) (= x2 x1) (= (* 2 x5) x6)), 1319330#(and (= x2 x1) (= (* 2 x4) x3) (= (* 2 x6) x5)), 1319329#(and (= x6 x5) (= (+ (* (- 1) x4) (* 2 x3)) 0) (= x2 x1))] [2022-03-15 21:02:22,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:02:22,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:02:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:02:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:02:22,212 INFO L87 Difference]: Start difference. First operand 70509 states and 501092 transitions. Second operand has 11 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:02:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:02:24,369 INFO L93 Difference]: Finished difference Result 79341 states and 549768 transitions. [2022-03-15 21:02:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:02:24,370 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:02:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:02:25,375 INFO L225 Difference]: With dead ends: 79341 [2022-03-15 21:02:25,375 INFO L226 Difference]: Without dead ends: 79273 [2022-03-15 21:02:25,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 157 SyntacticMatches, 630 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:02:25,376 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:02:25,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 21:02:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79273 states. [2022-03-15 21:02:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79273 to 74300. [2022-03-15 21:02:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74300 states, 74299 states have (on average 7.092531528015182) internal successors, (526968), 74299 states have internal predecessors, (526968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:02:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74300 states to 74300 states and 526968 transitions. [2022-03-15 21:02:29,546 INFO L78 Accepts]: Start accepts. Automaton has 74300 states and 526968 transitions. Word has length 24 [2022-03-15 21:02:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:02:29,546 INFO L470 AbstractCegarLoop]: Abstraction has 74300 states and 526968 transitions. [2022-03-15 21:02:29,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:02:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 74300 states and 526968 transitions. [2022-03-15 21:02:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:02:30,016 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:02:30,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:02:30,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-15 21:02:30,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:02:30,232 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 21:02:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:02:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1225820268, now seen corresponding path program 4 times [2022-03-15 21:02:30,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:02:30,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511403955] [2022-03-15 21:02:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:02:30,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:02:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:02:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:02:30,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:02:30,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511403955] [2022-03-15 21:02:30,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511403955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:02:30,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203383019] [2022-03-15 21:02:30,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:02:30,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:02:30,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:02:30,297 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) [2022-03-15 21:02:30,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 21:02:30,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:02:30,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:02:30,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:02:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:02:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:02:30,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:02:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:02:31,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203383019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:02:31,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:02:31,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 3] total 5 [2022-03-15 21:02:31,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [656534007] [2022-03-15 21:02:31,075 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:02:31,076 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:02:31,182 INFO L252 McrAutomatonBuilder]: Finished intersection with 688 states and 2482 transitions. [2022-03-15 21:02:31,182 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:02:54,144 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1547419#(and (= x6 x5) (= (+ (* (- 1) x4) (* 2 x3)) 0) (= x2 x1)), 1547420#(and (= x6 x5) (= (+ (* (- 1) x4) (* x3 4)) 0) (= x2 x1))] [2022-03-15 21:02:54,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:02:54,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:02:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:02:54,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:02:54,145 INFO L87 Difference]: Start difference. First operand 74300 states and 526968 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:02:55,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:02:55,402 INFO L93 Difference]: Finished difference Result 76285 states and 536156 transitions. [2022-03-15 21:02:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:02:55,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:02:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:02:56,231 INFO L225 Difference]: With dead ends: 76285 [2022-03-15 21:02:56,231 INFO L226 Difference]: Without dead ends: 76255 [2022-03-15 21:02:56,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 167 SyntacticMatches, 540 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:02:56,232 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:02:56,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:02:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76255 states. [2022-03-15 21:02:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76255 to 75184. [2022-03-15 21:02:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75184 states, 75183 states have (on average 7.076214037747895) internal successors, (532011), 75183 states have internal predecessors, (532011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:02:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75184 states to 75184 states and 532011 transitions. [2022-03-15 21:02:59,976 INFO L78 Accepts]: Start accepts. Automaton has 75184 states and 532011 transitions. Word has length 24 [2022-03-15 21:02:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:02:59,976 INFO L470 AbstractCegarLoop]: Abstraction has 75184 states and 532011 transitions. [2022-03-15 21:02:59,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:02:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 75184 states and 532011 transitions. [2022-03-15 21:03:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:03:00,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:03:00,398 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:03:00,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 21:03:00,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:03:00,615 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 21:03:00,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:03:00,615 INFO L85 PathProgramCache]: Analyzing trace with hash -94753196, now seen corresponding path program 5 times [2022-03-15 21:03:00,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:03:00,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816098684] [2022-03-15 21:03:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:03:00,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:03:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:03:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:03:00,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:03:00,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816098684] [2022-03-15 21:03:00,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816098684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:03:00,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792053833] [2022-03-15 21:03:00,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:03:00,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:03:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:03:00,646 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) [2022-03-15 21:03:00,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 21:03:00,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:03:00,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:03:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:03:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:03:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:03:00,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:03:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:03:00,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792053833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:03:00,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:03:00,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-03-15 21:03:00,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [608726966] [2022-03-15 21:03:00,935 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:03:00,937 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:03:01,226 INFO L252 McrAutomatonBuilder]: Finished intersection with 648 states and 2314 transitions. [2022-03-15 21:03:01,226 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:03:11,435 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1774229#(< x4 n), 1774233#(or (< x4 n) (<= (+ 2 n) (* 2 x3))), 1774234#(or (< (* 2 x4) n) (<= (+ 2 n) (* 2 x3)) (not (< x4 n))), 1774232#(or (< (* 2 x4) n) (<= (+ 2 n) x3) (not (< x4 n))), 1774231#(or (< (* 2 x4) n) (not (< x4 n))), 1774230#(or (<= (+ 2 n) x3) (< x4 n))] [2022-03-15 21:03:11,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:03:11,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:03:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:03:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:03:11,436 INFO L87 Difference]: Start difference. First operand 75184 states and 532011 transitions. Second operand has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 12 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:03:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:03:14,456 INFO L93 Difference]: Finished difference Result 153620 states and 1008836 transitions. [2022-03-15 21:03:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:03:14,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 12 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:03:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:03:16,351 INFO L225 Difference]: With dead ends: 153620 [2022-03-15 21:03:16,351 INFO L226 Difference]: Without dead ends: 141654 [2022-03-15 21:03:16,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 588 SyntacticMatches, 66 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:03:16,352 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 238 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:03:16,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 1 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:03:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141654 states. [2022-03-15 21:03:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141654 to 81185. [2022-03-15 21:03:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81185 states, 81184 states have (on average 7.052904513204572) internal successors, (572583), 81184 states have internal predecessors, (572583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:03:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81185 states to 81185 states and 572583 transitions. [2022-03-15 21:03:22,401 INFO L78 Accepts]: Start accepts. Automaton has 81185 states and 572583 transitions. Word has length 24 [2022-03-15 21:03:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:03:22,401 INFO L470 AbstractCegarLoop]: Abstraction has 81185 states and 572583 transitions. [2022-03-15 21:03:22,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 12 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:03:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 81185 states and 572583 transitions. [2022-03-15 21:03:22,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:03:22,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:03:22,817 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:03:22,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 21:03:23,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 21:03:23,035 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 21:03:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:03:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash -328858897, now seen corresponding path program 5 times [2022-03-15 21:03:23,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:03:23,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111094411] [2022-03-15 21:03:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:03:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:03:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:03:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:03:23,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:03:23,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111094411] [2022-03-15 21:03:23,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111094411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:03:23,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684257636] [2022-03-15 21:03:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:03:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:03:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:03:23,069 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) [2022-03-15 21:03:23,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 21:03:23,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:03:23,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:03:23,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:03:23,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:03:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:03:23,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:03:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:03:23,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684257636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:03:23,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:03:23,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2022-03-15 21:03:23,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1433920925] [2022-03-15 21:03:23,283 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:03:23,285 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:03:23,353 INFO L252 McrAutomatonBuilder]: Finished intersection with 552 states and 1910 transitions. [2022-03-15 21:03:23,353 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:03:30,940 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 20 new interpolants: [2090418#(or (< (* x1 8) n) (<= n (* x1 4)) (< x2 n)), 2090414#(or (< (* 2 x2) n) (< x1 n) (not (< x2 n))), 2090411#(or (< (* x1 4) n) (<= n (* 2 x1))), 2090412#(or (< (* x1 4) n) (< x2 n) (<= n (* 2 x1))), 2090423#(or (not (< x2 n)) (<= (+ 2 (* 2 x2)) x1)), 2090385#(< x2 n), 2090425#(or (not (< x1 n)) (<= n (* x1 4))), 2090416#(or (< (* x1 4) n) (< (* 2 x2) n) (<= n x2) (<= n (* 2 x1))), 2090408#(or (not (< x1 n)) (< (* 2 x1) n)), 2090424#(or (<= (+ 2 (* 2 x2)) (* 2 x1)) (not (< x2 n))), 2090421#(or (not (< x1 n)) (<= n (* 2 x1))), 2090413#(or (< (* 2 x2) n) (not (< x2 n))), 2090420#(<= n x1), 2090407#(< x1 n), 2090415#(or (not (< x1 n)) (< (* 2 x2) n) (not (< x2 n)) (< (* 2 x1) n)), 2090410#(or (not (< x1 n)) (< x2 n) (< (* 2 x1) n)), 2090419#(or (< (* 2 x2) n) (< (* x1 8) n) (<= n (* x1 4)) (<= n x2)), 2090417#(or (< (* x1 8) n) (<= n (* x1 4))), 2090422#(or (not (< x2 n)) (<= (+ 3 (* 2 x2)) n)), 2090409#(or (< x1 n) (< x2 n))] [2022-03-15 21:03:30,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:03:30,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:03:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:03:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:03:30,941 INFO L87 Difference]: Start difference. First operand 81185 states and 572583 transitions. Second operand has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:03:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:03:39,250 INFO L93 Difference]: Finished difference Result 328836 states and 2237024 transitions. [2022-03-15 21:03:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 21:03:39,250 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:03:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:03:43,954 INFO L225 Difference]: With dead ends: 328836 [2022-03-15 21:03:43,954 INFO L226 Difference]: Without dead ends: 323713 [2022-03-15 21:03:43,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 433 SyntacticMatches, 113 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5013 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1714, Invalid=8588, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 21:03:43,956 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 2799 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 2949 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2799 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 2949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:03:43,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2799 Valid, 1 Invalid, 3262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 2949 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 21:03:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323713 states. [2022-03-15 21:03:54,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323713 to 127970. [2022-03-15 21:03:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127970 states, 127969 states have (on average 7.357008337956849) internal successors, (941469), 127969 states have internal predecessors, (941469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:03:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127970 states to 127970 states and 941469 transitions. [2022-03-15 21:03:57,053 INFO L78 Accepts]: Start accepts. Automaton has 127970 states and 941469 transitions. Word has length 24 [2022-03-15 21:03:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:03:57,056 INFO L470 AbstractCegarLoop]: Abstraction has 127970 states and 941469 transitions. [2022-03-15 21:03:57,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:03:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 127970 states and 941469 transitions. [2022-03-15 21:03:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:03:57,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:03:57,924 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:03:57,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 21:03:58,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-15 21:03:58,132 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 21:03:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:03:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2051576347, now seen corresponding path program 6 times [2022-03-15 21:03:58,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:03:58,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784793809] [2022-03-15 21:03:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:03:58,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:03:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:03:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:03:58,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:03:58,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784793809] [2022-03-15 21:03:58,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784793809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:03:58,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391478525] [2022-03-15 21:03:58,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:03:58,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:03:58,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:03:58,182 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) [2022-03-15 21:03:58,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 21:03:58,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:03:58,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:03:58,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:03:58,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:03:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:03:58,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:03:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:03:58,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391478525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:03:58,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:03:58,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 21:03:58,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [327097924] [2022-03-15 21:03:58,342 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:03:58,344 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:03:58,434 INFO L252 McrAutomatonBuilder]: Finished intersection with 723 states and 2573 transitions. [2022-03-15 21:03:58,434 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:04:11,889 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 26 new interpolants: [2675499#(or (not (< x1 n)) (< (* 2 x2) n) (not (< x2 n)) (< (* 2 x1) n)), 2675504#(or (< (* x1 8) n) (<= n (* x1 4))), 2675495#(or (<= (+ (* x2 4) 1) n) (<= n (* 2 x2))), 2675507#(or (< (* x1 4) n) (< (* x2 4) n) (<= n (* 2 x1)) (<= n (* 2 x2))), 2675508#(or (< (* x1 8) n) (<= n (* x1 4)) (< (* x2 4) n) (<= n (* 2 x2))), 2675501#(or (< (* x1 4) n) (<= n (* 2 x1))), 2675500#(or (<= n x1) (< (* x2 4) n) (< (* 2 x1) n) (<= n (* 2 x2))), 2675513#(or (<= (+ (* x2 4) 1) n) (< x1 n)), 2675503#(or (< (* x1 4) n) (< (* 2 x2) n) (<= n x2) (<= n (* 2 x1))), 2675514#(or (not (< x1 n)) (<= (+ (* x2 4) 1) n) (< (* 2 x1) n)), 2675491#(< x1 n), 2675502#(or (< (* x1 4) n) (< x2 n) (<= n (* 2 x1))), 2675496#(or (< x1 n) (< (* x2 4) n) (<= n (* 2 x2))), 2675494#(or (< (* 2 x2) n) (< x1 n) (not (< x2 n))), 2675497#(or (not (< x1 n)) (< (* 2 x1) n)), 2675505#(or (< (* x1 8) n) (<= n (* x1 4)) (< x2 n)), 2675511#(or (< (* x1 4) n) (<= n (* 2 x1)) (<= (+ (* 2 x2) 1) n)), 2675498#(or (not (< x1 n)) (< x2 n) (< (* 2 x1) n)), 2675509#(or (< x1 n) (<= (+ (* 2 x2) 1) n)), 2675492#(or (< x1 n) (< x2 n)), 2675510#(or (not (< x1 n)) (<= (+ (* 2 x2) 1) n) (< (* 2 x1) n)), 2675515#(or (<= (+ (* x2 4) 1) n) (< (* x1 4) n) (<= n (* 2 x1))), 2675516#(or (<= (+ (* x2 4) 1) n) (< (* x1 8) n) (<= n (* x1 4))), 2675493#(or (not (< x2 n)) (<= (+ (* 2 x2) 1) n)), 2675512#(or (< (* x1 8) n) (<= n (* x1 4)) (<= (+ (* 2 x2) 1) n)), 2675506#(or (< (* 2 x2) n) (< (* x1 8) n) (<= n (* x1 4)) (<= n x2))] [2022-03-15 21:04:11,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:04:11,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:04:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:04:11,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:04:11,890 INFO L87 Difference]: Start difference. First operand 127970 states and 941469 transitions. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 33 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:04:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:04:18,890 INFO L93 Difference]: Finished difference Result 308006 states and 2228546 transitions. [2022-03-15 21:04:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 21:04:18,891 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 33 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:04:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:04:24,837 INFO L225 Difference]: With dead ends: 308006 [2022-03-15 21:04:24,837 INFO L226 Difference]: Without dead ends: 303031 [2022-03-15 21:04:24,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 534 SyntacticMatches, 183 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3621 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1332, Invalid=5474, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:04:24,839 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 1827 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1827 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:04:24,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1827 Valid, 1 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]