/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 02:26:45,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 02:26:45,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 02:26:45,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 02:26:45,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 02:26:45,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 02:26:45,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 02:26:45,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 02:26:45,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 02:26:45,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 02:26:45,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 02:26:45,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 02:26:45,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 02:26:45,229 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 02:26:45,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 02:26:45,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 02:26:45,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 02:26:45,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 02:26:45,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 02:26:45,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 02:26:45,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:26:45,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 02:26:45,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 02:26:45,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 02:26:45,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 02:26:45,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 02:26:45,231 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 02:26:45,232 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 02:26:45,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 02:26:45,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 02:26:45,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 02:26:45,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 02:26:45,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 02:26:45,463 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 02:26:45,464 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 02:26:45,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2022-03-20 02:26:45,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f542ccc/0679d604533d4972b53c69cbdf3e8ea0/FLAG190190551 [2022-03-20 02:26:45,838 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 02:26:45,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2022-03-20 02:26:45,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f542ccc/0679d604533d4972b53c69cbdf3e8ea0/FLAG190190551 [2022-03-20 02:26:46,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f542ccc/0679d604533d4972b53c69cbdf3e8ea0 [2022-03-20 02:26:46,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 02:26:46,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 02:26:46,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 02:26:46,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 02:26:46,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 02:26:46,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@80e781a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46, skipping insertion in model container [2022-03-20 02:26:46,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 02:26:46,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 02:26:46,479 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2022-03-20 02:26:46,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:26:46,502 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 02:26:46,518 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2022-03-20 02:26:46,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:26:46,532 INFO L208 MainTranslator]: Completed translation [2022-03-20 02:26:46,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46 WrapperNode [2022-03-20 02:26:46,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 02:26:46,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 02:26:46,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 02:26:46,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 02:26:46,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 02:26:46,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 02:26:46,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 02:26:46,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 02:26:46,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46" (1/1) ... [2022-03-20 02:26:46,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:26:46,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:46,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 02:26:46,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 02:26:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 02:26:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 02:26:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 02:26:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 02:26:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 02:26:46,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 02:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 02:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 02:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 02:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 02:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 02:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 02:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 02:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 02:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 02:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 02:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 02:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 02:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 02:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 02:26:46,694 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 02:26:46,696 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 02:26:46,860 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 02:26:46,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 02:26:46,879 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 02:26:46,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:26:46 BoogieIcfgContainer [2022-03-20 02:26:46,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 02:26:46,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 02:26:46,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 02:26:46,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 02:26:46,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:26:46" (1/3) ... [2022-03-20 02:26:46,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44330152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:26:46, skipping insertion in model container [2022-03-20 02:26:46,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:46" (2/3) ... [2022-03-20 02:26:46,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44330152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:26:46, skipping insertion in model container [2022-03-20 02:26:46,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:26:46" (3/3) ... [2022-03-20 02:26:46,896 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound2.c [2022-03-20 02:26:46,913 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 02:26:46,913 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 02:26:46,970 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 02:26:46,982 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 02:26:46,982 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 02:26:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 02:26:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 02:26:47,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:47,004 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:47,004 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2022-03-20 02:26:47,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:47,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742300685] [2022-03-20 02:26:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:47,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:47,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:26:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:26:47,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:47,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742300685] [2022-03-20 02:26:47,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742300685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:47,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:47,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 02:26:47,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533872381] [2022-03-20 02:26:47,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:47,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 02:26:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:47,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 02:26:47,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 02:26:47,182 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:47,239 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-03-20 02:26:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 02:26:47,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 02:26:47,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:47,246 INFO L225 Difference]: With dead ends: 47 [2022-03-20 02:26:47,246 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 02:26:47,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 02:26:47,251 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:47,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 02:26:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 02:26:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 02:26:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-03-20 02:26:47,278 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-03-20 02:26:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:47,278 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-03-20 02:26:47,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-03-20 02:26:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 02:26:47,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:47,284 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:47,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 02:26:47,285 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:47,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2022-03-20 02:26:47,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:47,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959561957] [2022-03-20 02:26:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:47,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:47,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:26:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:26:47,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:47,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959561957] [2022-03-20 02:26:47,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959561957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:47,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:47,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 02:26:47,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594775017] [2022-03-20 02:26:47,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:47,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:47,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:26:47,394 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:47,469 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-03-20 02:26:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 02:26:47,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 02:26:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:47,471 INFO L225 Difference]: With dead ends: 32 [2022-03-20 02:26:47,471 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 02:26:47,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:26:47,472 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:47,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:26:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 02:26:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 02:26:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 02:26:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-03-20 02:26:47,478 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-03-20 02:26:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:47,478 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-03-20 02:26:47,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-03-20 02:26:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 02:26:47,479 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:47,479 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:47,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 02:26:47,479 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2022-03-20 02:26:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:47,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534577645] [2022-03-20 02:26:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:47,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:47,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:26:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:26:47,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:47,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534577645] [2022-03-20 02:26:47,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534577645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:47,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:47,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 02:26:47,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872529996] [2022-03-20 02:26:47,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:47,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 02:26:47,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:47,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 02:26:47,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:26:47,552 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:47,699 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-03-20 02:26:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 02:26:47,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 02:26:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:47,700 INFO L225 Difference]: With dead ends: 36 [2022-03-20 02:26:47,700 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 02:26:47,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:26:47,702 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:47,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:26:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 02:26:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-20 02:26:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 02:26:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 02:26:47,712 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-03-20 02:26:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:47,712 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 02:26:47,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 02:26:47,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 02:26:47,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:47,713 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:47,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 02:26:47,713 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:47,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:47,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2022-03-20 02:26:47,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:47,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971194433] [2022-03-20 02:26:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:47,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:47,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727941231] [2022-03-20 02:26:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:47,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:47,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 02:26:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 02:26:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:26:47,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 02:26:47,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:47,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971194433] [2022-03-20 02:26:47,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:47,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727941231] [2022-03-20 02:26:47,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727941231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:47,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:47,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 02:26:47,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835529188] [2022-03-20 02:26:47,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:47,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:47,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:26:47,862 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 02:26:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:47,890 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-20 02:26:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:26:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-20 02:26:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:47,892 INFO L225 Difference]: With dead ends: 40 [2022-03-20 02:26:47,892 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 02:26:47,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:26:47,893 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:47,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 02:26:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-20 02:26:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 02:26:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-20 02:26:47,900 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-03-20 02:26:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:47,900 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-20 02:26:47,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 02:26:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-20 02:26:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 02:26:47,901 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:47,901 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:47,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:48,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:48,115 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 1 times [2022-03-20 02:26:48,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:48,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83430268] [2022-03-20 02:26:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:48,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:48,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95669020] [2022-03-20 02:26:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:48,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:48,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:48,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:48,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 02:26:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 02:26:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 02:26:48,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 02:26:48,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:48,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83430268] [2022-03-20 02:26:48,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:48,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95669020] [2022-03-20 02:26:48,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95669020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:48,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:48,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 02:26:48,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382486392] [2022-03-20 02:26:48,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:48,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:48,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:26:48,245 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 02:26:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:48,274 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-03-20 02:26:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:26:48,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 02:26:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:48,276 INFO L225 Difference]: With dead ends: 44 [2022-03-20 02:26:48,276 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 02:26:48,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:26:48,277 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:48,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:48,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 02:26:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 02:26:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 02:26:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-20 02:26:48,283 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-03-20 02:26:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:48,283 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-20 02:26:48,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 02:26:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-20 02:26:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 02:26:48,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:48,284 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:48,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:48,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:48,502 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:48,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2022-03-20 02:26:48,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:48,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914732096] [2022-03-20 02:26:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:48,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:48,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:48,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138266702] [2022-03-20 02:26:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:48,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:48,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:48,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:48,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 02:26:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 02:26:48,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 02:26:48,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 02:26:48,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914732096] [2022-03-20 02:26:48,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138266702] [2022-03-20 02:26:48,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138266702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 02:26:48,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 02:26:48,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-20 02:26:48,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172746277] [2022-03-20 02:26:48,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:48,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:48,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:48,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:48,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:26:48,685 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 02:26:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:48,712 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-03-20 02:26:48,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 02:26:48,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 30 [2022-03-20 02:26:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:48,713 INFO L225 Difference]: With dead ends: 50 [2022-03-20 02:26:48,713 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 02:26:48,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:26:48,714 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:48,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 92 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 02:26:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 02:26:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 02:26:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-03-20 02:26:48,724 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2022-03-20 02:26:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:48,725 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-03-20 02:26:48,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 02:26:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-03-20 02:26:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 02:26:48,726 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:48,726 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:48,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:48,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:48,944 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1324865054, now seen corresponding path program 1 times [2022-03-20 02:26:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:48,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911891605] [2022-03-20 02:26:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:48,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:48,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:48,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885515412] [2022-03-20 02:26:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:48,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:48,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:48,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:48,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 02:26:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 02:26:49,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 02:26:49,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 02:26:49,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:49,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911891605] [2022-03-20 02:26:49,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:49,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885515412] [2022-03-20 02:26:49,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885515412] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 02:26:49,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:26:49,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 02:26:49,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901179188] [2022-03-20 02:26:49,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:49,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:49,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:49,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 02:26:49,216 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 02:26:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:49,245 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-03-20 02:26:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:26:49,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 02:26:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:49,246 INFO L225 Difference]: With dead ends: 47 [2022-03-20 02:26:49,246 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 02:26:49,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:26:49,247 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:49,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 02:26:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 02:26:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 02:26:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-03-20 02:26:49,253 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 30 [2022-03-20 02:26:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:49,253 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-03-20 02:26:49,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 02:26:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-03-20 02:26:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 02:26:49,254 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:49,254 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:49,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:49,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:49,471 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:49,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1080733609, now seen corresponding path program 2 times [2022-03-20 02:26:49,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:49,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343055640] [2022-03-20 02:26:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:49,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:49,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:49,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732619345] [2022-03-20 02:26:49,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 02:26:49,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:49,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:49,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:49,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 02:26:49,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 02:26:49,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:26:49,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 02:26:49,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 02:26:49,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 02:26:49,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:49,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343055640] [2022-03-20 02:26:49,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:49,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732619345] [2022-03-20 02:26:49,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732619345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 02:26:49,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 02:26:49,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 02:26:49,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420180891] [2022-03-20 02:26:49,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:49,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 02:26:49,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:49,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 02:26:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:26:49,725 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 02:26:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:49,883 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-03-20 02:26:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 02:26:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2022-03-20 02:26:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:49,884 INFO L225 Difference]: With dead ends: 52 [2022-03-20 02:26:49,884 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 02:26:49,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:26:49,885 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:49,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 124 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:26:49,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 02:26:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 02:26:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-03-20 02:26:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 02:26:49,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-03-20 02:26:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:49,886 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 02:26:49,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 02:26:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 02:26:49,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 02:26:49,889 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 02:26:49,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:50,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:50,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 02:26:50,246 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-20 02:26:50,246 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-20 02:26:50,246 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-20 02:26:50,246 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2022-03-20 02:26:50,246 INFO L882 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-03-20 02:26:50,246 INFO L882 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-03-20 02:26:50,246 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-03-20 02:26:50,246 INFO L882 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-03-20 02:26:50,247 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:50,247 INFO L878 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:50,247 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2022-03-20 02:26:50,247 INFO L882 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-03-20 02:26:50,247 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2022-03-20 02:26:50,247 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:50,247 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:50,247 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 0) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:50,247 INFO L882 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-03-20 02:26:50,247 INFO L878 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 2))) (and (= (+ .cse0 (* main_~a~0 main_~a~0) 1) main_~s~0) (= main_~t~0 (+ .cse0 1)))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:50,247 INFO L878 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:50,247 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (and (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:50,247 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 02:26:50,248 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 02:26:50,248 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 02:26:50,248 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 02:26:50,248 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2022-03-20 02:26:50,248 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 02:26:50,248 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 02:26:50,248 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-20 02:26:50,248 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-03-20 02:26:50,248 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-03-20 02:26:50,248 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-03-20 02:26:50,248 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-03-20 02:26:50,248 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-03-20 02:26:50,252 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:50,253 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 02:26:50,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 02:26:50 BoogieIcfgContainer [2022-03-20 02:26:50,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 02:26:50,266 INFO L158 Benchmark]: Toolchain (without parser) took 3982.88ms. Allocated memory was 200.3MB in the beginning and 325.1MB in the end (delta: 124.8MB). Free memory was 144.2MB in the beginning and 238.5MB in the end (delta: -94.3MB). Peak memory consumption was 30.1MB. Max. memory is 8.0GB. [2022-03-20 02:26:50,266 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory was 160.2MB in the beginning and 160.1MB in the end (delta: 73.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 02:26:50,266 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.41ms. Allocated memory was 200.3MB in the beginning and 325.1MB in the end (delta: 124.8MB). Free memory was 144.0MB in the beginning and 298.6MB in the end (delta: -154.6MB). Peak memory consumption was 6.7MB. Max. memory is 8.0GB. [2022-03-20 02:26:50,266 INFO L158 Benchmark]: Boogie Preprocessor took 31.72ms. Allocated memory is still 325.1MB. Free memory was 298.6MB in the beginning and 296.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 02:26:50,266 INFO L158 Benchmark]: RCFGBuilder took 314.31ms. Allocated memory is still 325.1MB. Free memory was 296.5MB in the beginning and 286.6MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 02:26:50,267 INFO L158 Benchmark]: TraceAbstraction took 3374.17ms. Allocated memory is still 325.1MB. Free memory was 286.1MB in the beginning and 238.5MB in the end (delta: 47.6MB). Peak memory consumption was 47.0MB. Max. memory is 8.0GB. [2022-03-20 02:26:50,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory was 160.2MB in the beginning and 160.1MB in the end (delta: 73.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 243.41ms. Allocated memory was 200.3MB in the beginning and 325.1MB in the end (delta: 124.8MB). Free memory was 144.0MB in the beginning and 298.6MB in the end (delta: -154.6MB). Peak memory consumption was 6.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.72ms. Allocated memory is still 325.1MB. Free memory was 298.6MB in the beginning and 296.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 314.31ms. Allocated memory is still 325.1MB. Free memory was 296.5MB in the beginning and 286.6MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 3374.17ms. Allocated memory is still 325.1MB. Free memory was 286.1MB in the beginning and 238.5MB in the end (delta: 47.6MB). Peak memory consumption was 47.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.3s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 74 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 60 mSDsluCounter, 648 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 433 mSDsCounter, 64 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 300 IncrementalHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 64 mSolverCounterUnsat, 215 mSDtfsCounter, 300 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 253 GetRequests, 209 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=7, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 41 PreInvPairs, 62 NumberOfFragments, 203 HoareAnnotationTreeSize, 41 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 535 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 253 ConstructedInterpolants, 0 QuantifiedInterpolants, 822 SizeOfPredicates, 7 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 149/164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (a * 2 + a * a + 1 == s && t == a * 2 + 1) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! [2022-03-20 02:26:50,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...