/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_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 16:06:05,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 16:06:05,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 16:06:05,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 16:06:05,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 16:06:05,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 16:06:05,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 16:06:05,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 16:06:05,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 16:06:05,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 16:06:05,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 16:06:05,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-18 16:06:05,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 16:06:05,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 16:06:05,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 16:06:05,979 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 [2022-03-18 16:06:05,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 16:06:05,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 16:06:05,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 16:06:05,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 16:06:05,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 16:06:05,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 16:06:05,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 16:06:05,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 16:06:05,996 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 16:06:05,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 16:06:05,996 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 16:06:05,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 16:06:05,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 16:06:05,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 16:06:05,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 16:06:05,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 16:06:05,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 16:06:05,997 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 16:06:05,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 16:06:05,998 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 16:06:05,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 16:06:05,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 16:06:05,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 16:06:05,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 16:06:05,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 16:06:05,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 16:06:05,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 16:06:05,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 16:06:05,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 16:06:05,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 16:06:05,999 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 16:06:05,999 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 16:06:05,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 16:06:05,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 16:06:06,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 16:06:06,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 16:06:06,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 16:06:06,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 16:06:06,209 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 16:06:06,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2022-03-18 16:06:06,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d89c5a8a7/f5610e95baa14e4c9fe577466046ea41/FLAG2430a806e [2022-03-18 16:06:06,555 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 16:06:06,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2022-03-18 16:06:06,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d89c5a8a7/f5610e95baa14e4c9fe577466046ea41/FLAG2430a806e [2022-03-18 16:06:06,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d89c5a8a7/f5610e95baa14e4c9fe577466046ea41 [2022-03-18 16:06:06,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 16:06:06,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 16:06:06,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 16:06:06,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 16:06:06,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 16:06:06,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:06:06" (1/1) ... [2022-03-18 16:06:06,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c5f2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:06, skipping insertion in model container [2022-03-18 16:06:06,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:06:06" (1/1) ... [2022-03-18 16:06:06,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 16:06:07,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 16:06:07,132 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_unwindbound100.c[520,533] [2022-03-18 16:06:07,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 16:06:07,153 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 16:06:07,165 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_unwindbound100.c[520,533] [2022-03-18 16:06:07,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 16:06:07,199 INFO L208 MainTranslator]: Completed translation [2022-03-18 16:06:07,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07 WrapperNode [2022-03-18 16:06:07,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 16:06:07,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 16:06:07,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 16:06:07,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 16:06:07,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07" (1/1) ... [2022-03-18 16:06:07,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07" (1/1) ... [2022-03-18 16:06:07,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07" (1/1) ... [2022-03-18 16:06:07,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07" (1/1) ... [2022-03-18 16:06:07,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07" (1/1) ... [2022-03-18 16:06:07,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07" (1/1) ... [2022-03-18 16:06:07,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07" (1/1) ... [2022-03-18 16:06:07,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 16:06:07,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 16:06:07,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 16:06:07,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 16:06:07,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07" (1/1) ... [2022-03-18 16:06:07,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 16:06:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:06:07,250 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) [2022-03-18 16:06:07,256 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 [2022-03-18 16:06:07,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 16:06:07,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 16:06:07,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 16:06:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 16:06:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 16:06:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 16:06:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 16:06:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 16:06:07,331 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 16:06:07,333 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 16:06:07,454 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 16:06:07,458 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 16:06:07,458 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 16:06:07,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:06:07 BoogieIcfgContainer [2022-03-18 16:06:07,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 16:06:07,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 16:06:07,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 16:06:07,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 16:06:07,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 04:06:06" (1/3) ... [2022-03-18 16:06:07,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1239dc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:06:07, skipping insertion in model container [2022-03-18 16:06:07,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:06:07" (2/3) ... [2022-03-18 16:06:07,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1239dc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:06:07, skipping insertion in model container [2022-03-18 16:06:07,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:06:07" (3/3) ... [2022-03-18 16:06:07,480 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound100.c [2022-03-18 16:06:07,492 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 16:06:07,492 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 16:06:07,540 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 16:06:07,545 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 [2022-03-18 16:06:07,545 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 16:06:07,565 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) [2022-03-18 16:06:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 16:06:07,573 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:06:07,574 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:06:07,574 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:06:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:06:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2022-03-18 16:06:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:06:07,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620155773] [2022-03-18 16:06:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:07,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:06:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:07,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:06:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:06:07,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:06:07,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620155773] [2022-03-18 16:06:07,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620155773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:06:07,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:06:07,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 16:06:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938639040] [2022-03-18 16:06:07,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:06:07,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 16:06:07,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:06:07,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 16:06:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 16:06:07,731 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) [2022-03-18 16:06:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:06:07,799 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-03-18 16:06:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 16:06:07,801 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 [2022-03-18 16:06:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:06:07,806 INFO L225 Difference]: With dead ends: 47 [2022-03-18 16:06:07,806 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 16:06:07,808 INFO L911 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 [2022-03-18 16:06:07,812 INFO L912 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 [2022-03-18 16:06:07,812 INFO L913 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] [2022-03-18 16:06:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 16:06:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-18 16:06:07,834 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) [2022-03-18 16:06:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-03-18 16:06:07,835 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-03-18 16:06:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:06:07,836 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-03-18 16:06:07,836 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) [2022-03-18 16:06:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-03-18 16:06:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 16:06:07,837 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:06:07,837 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:06:07,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 16:06:07,837 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:06:07,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:06:07,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2022-03-18 16:06:07,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:06:07,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661137816] [2022-03-18 16:06:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:07,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:06:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:07,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:06:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:06:07,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:06:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661137816] [2022-03-18 16:06:07,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661137816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:06:07,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:06:07,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:06:07,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273873973] [2022-03-18 16:06:07,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:06:07,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 16:06:07,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:06:07,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 16:06:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:06:07,899 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) [2022-03-18 16:06:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:06:07,963 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-03-18 16:06:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 16:06:07,963 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 [2022-03-18 16:06:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:06:07,964 INFO L225 Difference]: With dead ends: 32 [2022-03-18 16:06:07,964 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 16:06:07,965 INFO L911 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 [2022-03-18 16:06:07,965 INFO L912 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 [2022-03-18 16:06:07,966 INFO L913 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] [2022-03-18 16:06:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 16:06:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-18 16:06:07,970 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) [2022-03-18 16:06:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-03-18 16:06:07,970 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-03-18 16:06:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:06:07,971 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-03-18 16:06:07,971 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) [2022-03-18 16:06:07,971 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-03-18 16:06:07,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 16:06:07,971 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:06:07,971 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:06:07,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 16:06:07,972 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:06:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:06:07,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2022-03-18 16:06:07,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:06:07,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872916620] [2022-03-18 16:06:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:07,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:06:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:08,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:06:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:06:08,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:06:08,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872916620] [2022-03-18 16:06:08,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872916620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:06:08,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:06:08,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 16:06:08,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198293238] [2022-03-18 16:06:08,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:06:08,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 16:06:08,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:06:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 16:06:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 16:06:08,064 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) [2022-03-18 16:06:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:06:08,232 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-03-18 16:06:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 16:06:08,232 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 [2022-03-18 16:06:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:06:08,234 INFO L225 Difference]: With dead ends: 36 [2022-03-18 16:06:08,234 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 16:06:08,234 INFO L911 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 [2022-03-18 16:06:08,235 INFO L912 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 [2022-03-18 16:06:08,236 INFO L913 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] [2022-03-18 16:06:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 16:06:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-18 16:06:08,242 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) [2022-03-18 16:06:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-18 16:06:08,244 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-03-18 16:06:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:06:08,244 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-18 16:06:08,244 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) [2022-03-18 16:06:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-18 16:06:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 16:06:08,247 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:06:08,247 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:06:08,248 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 16:06:08,248 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:06:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:06:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2022-03-18 16:06:08,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:06:08,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669416883] [2022-03-18 16:06:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:08,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:06:08,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 16:06:08,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791986570] [2022-03-18 16:06:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:08,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:06:08,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:06:08,261 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) [2022-03-18 16:06:08,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 16:06:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:08,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 16:06:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:06:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:06:08,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 16:06:08,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:06:08,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669416883] [2022-03-18 16:06:08,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 16:06:08,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791986570] [2022-03-18 16:06:08,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791986570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:06:08,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:06:08,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 16:06:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667650880] [2022-03-18 16:06:08,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:06:08,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 16:06:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:06:08,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 16:06:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:06:08,416 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) [2022-03-18 16:06:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:06:08,474 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-18 16:06:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 16:06:08,474 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 [2022-03-18 16:06:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:06:08,475 INFO L225 Difference]: With dead ends: 40 [2022-03-18 16:06:08,475 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 16:06:08,476 INFO L911 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 [2022-03-18 16:06:08,476 INFO L912 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 [2022-03-18 16:06:08,477 INFO L913 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] [2022-03-18 16:06:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 16:06:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-18 16:06:08,482 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) [2022-03-18 16:06:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-18 16:06:08,483 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-03-18 16:06:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:06:08,484 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-18 16:06:08,484 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) [2022-03-18 16:06:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-18 16:06:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 16:06:08,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:06:08,485 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:06:08,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 16:06:08,704 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 [2022-03-18 16:06:08,705 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:06:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:06:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 1 times [2022-03-18 16:06:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:06:08,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149859091] [2022-03-18 16:06:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:08,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:06:08,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 16:06:08,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645921381] [2022-03-18 16:06:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:08,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:06:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:06:08,728 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) [2022-03-18 16:06:08,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 16:06:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 16:06:08,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:06:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 16:06:08,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 16:06:08,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:06:08,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149859091] [2022-03-18 16:06:08,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 16:06:08,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645921381] [2022-03-18 16:06:08,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645921381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:06:08,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:06:08,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 16:06:08,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582715252] [2022-03-18 16:06:08,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:06:08,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 16:06:08,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:06:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 16:06:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:06:08,887 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) [2022-03-18 16:06:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:06:08,938 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-03-18 16:06:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 16:06:08,940 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 [2022-03-18 16:06:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:06:08,941 INFO L225 Difference]: With dead ends: 44 [2022-03-18 16:06:08,941 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 16:06:08,942 INFO L911 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 [2022-03-18 16:06:08,943 INFO L912 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 [2022-03-18 16:06:08,943 INFO L913 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] [2022-03-18 16:06:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 16:06:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-18 16:06:08,950 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) [2022-03-18 16:06:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-18 16:06:08,951 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-03-18 16:06:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:06:08,951 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-18 16:06:08,951 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) [2022-03-18 16:06:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-18 16:06:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 16:06:08,952 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:06:08,952 INFO L500 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] [2022-03-18 16:06:08,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 16:06:09,159 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 [2022-03-18 16:06:09,160 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:06:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:06:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2022-03-18 16:06:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:06:09,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122066622] [2022-03-18 16:06:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:06:09,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 16:06:09,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586323008] [2022-03-18 16:06:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:09,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:06:09,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:06:09,176 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) [2022-03-18 16:06:09,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 16:06:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:09,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 16:06:09,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:06:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 16:06:09,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:06:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 16:06:09,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:06:09,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122066622] [2022-03-18 16:06:09,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 16:06:09,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586323008] [2022-03-18 16:06:09,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586323008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 16:06:09,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 16:06:09,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 16:06:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372024200] [2022-03-18 16:06:09,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 16:06:09,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 16:06:09,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:06:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 16:06:09,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 16:06:09,379 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 16:06:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:06:09,487 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-03-18 16:06:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 16:06:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2022-03-18 16:06:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:06:09,489 INFO L225 Difference]: With dead ends: 80 [2022-03-18 16:06:09,489 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 16:06:09,489 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 16:06:09,490 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:06:09,490 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 153 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:06:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 16:06:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-03-18 16:06:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 16:06:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-03-18 16:06:09,502 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 30 [2022-03-18 16:06:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:06:09,502 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-03-18 16:06:09,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 16:06:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-03-18 16:06:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 16:06:09,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:06:09,503 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:06:09,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 16:06:09,715 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 [2022-03-18 16:06:09,716 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:06:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:06:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1324865054, now seen corresponding path program 1 times [2022-03-18 16:06:09,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:06:09,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671974295] [2022-03-18 16:06:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:09,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:06:09,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 16:06:09,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714033881] [2022-03-18 16:06:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:09,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:06:09,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:06:09,725 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) [2022-03-18 16:06:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 16:06:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:06:09,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 16:06:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:06:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 16:06:09,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:06:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 16:06:09,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:06:09,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671974295] [2022-03-18 16:06:09,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 16:06:09,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714033881] [2022-03-18 16:06:09,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714033881] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 16:06:09,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 16:06:09,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 16:06:09,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864796788] [2022-03-18 16:06:09,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:06:09,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 16:06:09,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:06:09,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 16:06:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 16:06:09,901 INFO L87 Difference]: Start difference. First operand 67 states and 85 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) [2022-03-18 16:06:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:06:09,931 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2022-03-18 16:06:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 16:06:09,931 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 [2022-03-18 16:06:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:06:09,932 INFO L225 Difference]: With dead ends: 81 [2022-03-18 16:06:09,933 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 16:06:09,933 INFO L911 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 [2022-03-18 16:06:09,933 INFO L912 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 [2022-03-18 16:06:09,934 INFO L913 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] [2022-03-18 16:06:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 16:06:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-18 16:06:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 16:06:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-03-18 16:06:09,943 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 30 [2022-03-18 16:06:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:06:09,943 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-03-18 16:06:09,943 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) [2022-03-18 16:06:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-03-18 16:06:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 16:06:09,944 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:06:09,944 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:06:09,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 16:06:10,162 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 [2022-03-18 16:06:10,162 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:06:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:06:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1080733609, now seen corresponding path program 2 times [2022-03-18 16:06:10,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:06:10,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756442859] [2022-03-18 16:06:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:06:10,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:06:10,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 16:06:10,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738605708] [2022-03-18 16:06:10,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 16:06:10,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:06:10,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:06:10,183 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) [2022-03-18 16:06:10,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 16:06:10,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 16:06:10,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 16:06:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 16:06:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:06:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 16:06:10,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:06:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 16:06:10,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:06:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756442859] [2022-03-18 16:06:10,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 16:06:10,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738605708] [2022-03-18 16:06:10,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738605708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 16:06:10,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 16:06:10,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-18 16:06:10,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922339702] [2022-03-18 16:06:10,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 16:06:10,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 16:06:10,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:06:10,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 16:06:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 16:06:10,392 INFO L87 Difference]: Start difference. First operand 79 states and 94 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) [2022-03-18 16:06:10,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:06:10,618 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-18 16:06:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 16:06:10,619 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 [2022-03-18 16:06:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:06:10,620 INFO L225 Difference]: With dead ends: 79 [2022-03-18 16:06:10,620 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 16:06:10,620 INFO L911 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 [2022-03-18 16:06:10,621 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 16:06:10,621 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 16:06:10,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 16:06:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 16:06:10,621 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) [2022-03-18 16:06:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 16:06:10,622 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-03-18 16:06:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:06:10,622 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 16:06:10,622 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) [2022-03-18 16:06:10,622 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 16:06:10,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 16:06:10,624 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 16:06:10,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-18 16:06:10,835 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 [2022-03-18 16:06:10,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 16:06:11,032 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-18 16:06:11,032 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-18 16:06:11,032 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-18 16:06:11,032 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2022-03-18 16:06:11,032 INFO L882 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-03-18 16:06:11,032 INFO L882 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-03-18 16:06:11,032 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-03-18 16:06:11,032 INFO L882 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-03-18 16:06:11,033 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))) [2022-03-18 16:06:11,033 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))) [2022-03-18 16:06:11,033 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2022-03-18 16:06:11,033 INFO L882 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-03-18 16:06:11,033 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2022-03-18 16:06:11,033 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))) [2022-03-18 16:06:11,033 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))) [2022-03-18 16:06:11,033 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 0) (not (= |old(~counter~0)| 0))) [2022-03-18 16:06:11,033 INFO L882 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-03-18 16:06:11,033 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))) [2022-03-18 16:06:11,033 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))) [2022-03-18 16:06:11,034 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))) [2022-03-18 16:06:11,034 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 16:06:11,034 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|)) [2022-03-18 16:06:11,034 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 16:06:11,034 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 16:06:11,034 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2022-03-18 16:06:11,034 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 16:06:11,034 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 16:06:11,034 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-18 16:06:11,034 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-03-18 16:06:11,034 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-03-18 16:06:11,034 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-03-18 16:06:11,034 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-03-18 16:06:11,035 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-03-18 16:06:11,037 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-03-18 16:06:11,037 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 16:06:11,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 04:06:11 BoogieIcfgContainer [2022-03-18 16:06:11,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 16:06:11,046 INFO L158 Benchmark]: Toolchain (without parser) took 4061.24ms. Allocated memory was 207.6MB in the beginning and 335.5MB in the end (delta: 127.9MB). Free memory was 156.4MB in the beginning and 208.1MB in the end (delta: -51.7MB). Peak memory consumption was 75.9MB. Max. memory is 8.0GB. [2022-03-18 16:06:11,046 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 207.6MB. Free memory is still 172.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 16:06:11,047 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.43ms. Allocated memory was 207.6MB in the beginning and 335.5MB in the end (delta: 127.9MB). Free memory was 156.1MB in the beginning and 311.1MB in the end (delta: -155.0MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. [2022-03-18 16:06:11,047 INFO L158 Benchmark]: Boogie Preprocessor took 28.10ms. Allocated memory is still 335.5MB. Free memory was 311.1MB in the beginning and 309.8MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 16:06:11,047 INFO L158 Benchmark]: RCFGBuilder took 230.33ms. Allocated memory is still 335.5MB. Free memory was 309.5MB in the beginning and 299.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 16:06:11,047 INFO L158 Benchmark]: TraceAbstraction took 3585.46ms. Allocated memory is still 335.5MB. Free memory was 298.5MB in the beginning and 208.1MB in the end (delta: 90.4MB). Peak memory consumption was 90.9MB. Max. memory is 8.0GB. [2022-03-18 16:06:11,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 207.6MB. Free memory is still 172.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.43ms. Allocated memory was 207.6MB in the beginning and 335.5MB in the end (delta: 127.9MB). Free memory was 156.1MB in the beginning and 311.1MB in the end (delta: -155.0MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.10ms. Allocated memory is still 335.5MB. Free memory was 311.1MB in the beginning and 309.8MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 230.33ms. Allocated memory is still 335.5MB. Free memory was 309.5MB in the beginning and 299.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3585.46ms. Allocated memory is still 335.5MB. Free memory was 298.5MB in the beginning and 208.1MB in the end (delta: 90.4MB). Peak memory consumption was 90.9MB. 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: 3.5s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 121 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 107 mSDsluCounter, 688 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 464 mSDsCounter, 89 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 340 IncrementalHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 89 mSolverCounterUnsat, 224 mSDtfsCounter, 340 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=7, InterpolantAutomatonStates: 49, 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, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 47 PreInvPairs, 76 NumberOfFragments, 203 HoareAnnotationTreeSize, 47 FomulaSimplifications, 36 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 879 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s 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! [2022-03-18 16:06:11,061 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...