/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 06:57:16,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 06:57:16,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 06:57:16,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 06:57:16,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 06:57:16,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 06:57:16,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 06:57:16,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 06:57:16,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 06:57:16,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 06:57:16,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 06:57:16,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 06:57:16,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 06:57:16,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 06:57:16,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 06:57:16,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 06:57:16,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 06:57:16,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 06:57:16,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 06:57:16,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 06:57:16,205 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 06:57:16,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 06:57:16,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 06:57:16,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 06:57:16,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 06:57:16,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 06:57:16,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 06:57:16,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 06:57:16,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 06:57:16,220 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 06:57:16,230 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 06:57:16,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 06:57:16,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 06:57:16,231 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 06:57:16,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 06:57:16,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 06:57:16,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 06:57:16,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 06:57:16,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 06:57:16,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 06:57:16,233 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 06:57:16,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 06:57:16,233 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 06:57:16,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 06:57:16,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 06:57:16,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 06:57:16,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 06:57:16,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 06:57:16,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:57:16,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 06:57:16,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 06:57:16,234 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 06:57:16,235 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 06:57:16,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 06:57:16,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 06:57:16,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 06:57:16,464 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 06:57:16,464 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 06:57:16,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-04-06 06:57:16,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67b0ec049/6758d82c226849e99b569d6e020410c9/FLAGfb8ce6f5f [2022-04-06 06:57:16,857 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 06:57:16,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-04-06 06:57:16,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67b0ec049/6758d82c226849e99b569d6e020410c9/FLAGfb8ce6f5f [2022-04-06 06:57:17,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67b0ec049/6758d82c226849e99b569d6e020410c9 [2022-04-06 06:57:17,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 06:57:17,308 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 06:57:17,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 06:57:17,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 06:57:17,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 06:57:17,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c4d4370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17, skipping insertion in model container [2022-04-06 06:57:17,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 06:57:17,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 06:57:17,457 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/fermat1-ll_unwindbound20.c[535,548] [2022-04-06 06:57:17,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:57:17,479 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 06:57:17,488 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/fermat1-ll_unwindbound20.c[535,548] [2022-04-06 06:57:17,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:57:17,506 INFO L208 MainTranslator]: Completed translation [2022-04-06 06:57:17,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17 WrapperNode [2022-04-06 06:57:17,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 06:57:17,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 06:57:17,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 06:57:17,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 06:57:17,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 06:57:17,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 06:57:17,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 06:57:17,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 06:57:17,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:57:17,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:17,561 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) [2022-04-06 06:57:17,576 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 [2022-04-06 06:57:17,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 06:57:17,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 06:57:17,610 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 06:57:17,610 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 06:57:17,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 06:57:17,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 06:57:17,611 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 06:57:17,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 06:57:17,611 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 06:57:17,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 06:57:17,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 06:57:17,612 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 06:57:17,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 06:57:17,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 06:57:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 06:57:17,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 06:57:17,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 06:57:17,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 06:57:17,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 06:57:17,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 06:57:17,673 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 06:57:17,674 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 06:57:17,789 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 06:57:17,793 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 06:57:17,793 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 06:57:17,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:57:17 BoogieIcfgContainer [2022-04-06 06:57:17,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 06:57:17,796 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 06:57:17,796 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 06:57:17,797 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 06:57:17,799 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:57:17" (1/1) ... [2022-04-06 06:57:17,801 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 06:57:17,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:57:17 BasicIcfg [2022-04-06 06:57:17,820 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 06:57:17,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 06:57:17,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 06:57:17,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 06:57:17,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:57:17" (1/4) ... [2022-04-06 06:57:17,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7adbac43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:57:17, skipping insertion in model container [2022-04-06 06:57:17,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:57:17" (2/4) ... [2022-04-06 06:57:17,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7adbac43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:57:17, skipping insertion in model container [2022-04-06 06:57:17,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:57:17" (3/4) ... [2022-04-06 06:57:17,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7adbac43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:57:17, skipping insertion in model container [2022-04-06 06:57:17,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:57:17" (4/4) ... [2022-04-06 06:57:17,825 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.cJordan [2022-04-06 06:57:17,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 06:57:17,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 06:57:17,861 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 06:57:17,866 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 06:57:17,866 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 06:57:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 06:57:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 06:57:17,918 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:17,919 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:17,919 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:17,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:17,923 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2022-04-06 06:57:17,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:17,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615315617] [2022-04-06 06:57:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:17,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:18,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:18,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796377589] [2022-04-06 06:57:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:18,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:18,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:18,022 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) [2022-04-06 06:57:18,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 06:57:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:18,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-06 06:57:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 06:57:18,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:57:18,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:18,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615315617] [2022-04-06 06:57:18,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:18,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796377589] [2022-04-06 06:57:18,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796377589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:57:18,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:57:18,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-06 06:57:18,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758219162] [2022-04-06 06:57:18,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:57:18,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-06 06:57:18,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-06 06:57:18,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 06:57:18,238 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:57:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:18,253 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-04-06 06:57:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-06 06:57:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 06:57:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:18,261 INFO L225 Difference]: With dead ends: 37 [2022-04-06 06:57:18,261 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 06:57:18,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 06:57:18,266 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:18,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:57:18,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 06:57:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 06:57:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 06:57:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 06:57:18,303 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-04-06 06:57:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:18,303 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 06:57:18,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:57:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 06:57:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:57:18,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:18,305 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:18,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:18,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-04-06 06:57:18,506 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2022-04-06 06:57:18,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:18,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723352895] [2022-04-06 06:57:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:18,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:18,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:18,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712393218] [2022-04-06 06:57:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:18,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:18,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:18,527 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) [2022-04-06 06:57:18,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 06:57:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:18,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 06:57:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:18,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:57:18,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:18,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723352895] [2022-04-06 06:57:18,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:18,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712393218] [2022-04-06 06:57:18,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712393218] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:57:18,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:57:18,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 06:57:18,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835038456] [2022-04-06 06:57:18,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:57:18,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 06:57:18,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:18,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 06:57:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:57:18,715 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:57:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:18,729 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-04-06 06:57:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 06:57:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 06:57:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:18,730 INFO L225 Difference]: With dead ends: 34 [2022-04-06 06:57:18,730 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 06:57:18,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:57:18,732 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:18,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:57:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 06:57:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 06:57:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 06:57:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-04-06 06:57:18,754 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-04-06 06:57:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:18,755 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-04-06 06:57:18,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:57:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-04-06 06:57:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:57:18,756 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:18,756 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:18,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:18,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-04-06 06:57:18,964 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:18,965 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2022-04-06 06:57:18,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:18,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078365176] [2022-04-06 06:57:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:18,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:18,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:18,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051951992] [2022-04-06 06:57:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:18,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:18,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:18,981 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) [2022-04-06 06:57:18,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 06:57:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:19,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 06:57:19,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:30,891 WARN L232 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 25 DAG size of output: 3 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 06:57:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:30,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:57:30,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:30,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078365176] [2022-04-06 06:57:30,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:30,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051951992] [2022-04-06 06:57:30,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051951992] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:57:30,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:57:30,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:57:30,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059165735] [2022-04-06 06:57:30,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:57:30,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:57:30,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:30,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:57:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:57:30,906 INFO L87 Difference]: Start difference. First operand 34 states and 43 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:57:33,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:57:36,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:57:38,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:57:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:38,188 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-04-06 06:57:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:57:38,188 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-06 06:57:38,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:38,190 INFO L225 Difference]: With dead ends: 51 [2022-04-06 06:57:38,190 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 06:57:38,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:57:38,191 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:38,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 119 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-04-06 06:57:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 06:57:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 06:57:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 06:57:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-04-06 06:57:38,200 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-04-06 06:57:38,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:38,203 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-04-06 06:57:38,204 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:57:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-04-06 06:57:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 06:57:38,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:38,205 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:38,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:38,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:38,420 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:38,420 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2022-04-06 06:57:38,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:38,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406857946] [2022-04-06 06:57:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:38,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:38,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:38,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985607312] [2022-04-06 06:57:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:38,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:38,438 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) [2022-04-06 06:57:38,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 06:57:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:38,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 06:57:38,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:38,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:38,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:38,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406857946] [2022-04-06 06:57:38,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:38,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985607312] [2022-04-06 06:57:38,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985607312] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:38,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:38,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 06:57:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829646804] [2022-04-06 06:57:38,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:38,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 06:57:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 06:57:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:57:38,802 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 06:57:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:38,933 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-04-06 06:57:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 06:57:38,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-04-06 06:57:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:38,935 INFO L225 Difference]: With dead ends: 55 [2022-04-06 06:57:38,935 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 06:57:38,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 06:57:38,936 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:38,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 147 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:57:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 06:57:38,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 06:57:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 06:57:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-04-06 06:57:38,943 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 29 [2022-04-06 06:57:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:38,944 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-04-06 06:57:38,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 06:57:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-04-06 06:57:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 06:57:38,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:38,945 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:38,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:39,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:39,151 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2022-04-06 06:57:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:39,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504331553] [2022-04-06 06:57:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:39,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:39,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:39,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491630848] [2022-04-06 06:57:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:39,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:39,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:39,163 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) [2022-04-06 06:57:39,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 06:57:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:57:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:39,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:57:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504331553] [2022-04-06 06:57:39,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491630848] [2022-04-06 06:57:39,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491630848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:57:39,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:57:39,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:57:39,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875305389] [2022-04-06 06:57:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:57:39,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:57:39,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:57:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:57:39,311 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 06:57:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:39,333 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-04-06 06:57:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:57:39,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-04-06 06:57:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:39,335 INFO L225 Difference]: With dead ends: 60 [2022-04-06 06:57:39,335 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 06:57:39,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:57:39,336 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:39,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:57:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 06:57:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-06 06:57:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 06:57:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-04-06 06:57:39,344 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 35 [2022-04-06 06:57:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:39,344 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-04-06 06:57:39,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 06:57:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-04-06 06:57:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 06:57:39,345 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:39,346 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:39,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:39,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:39,569 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:39,569 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2022-04-06 06:57:39,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:39,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223162414] [2022-04-06 06:57:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:39,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:39,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:39,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692580023] [2022-04-06 06:57:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:39,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:39,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:39,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:39,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 06:57:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:57:39,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:39,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:57:39,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:39,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223162414] [2022-04-06 06:57:39,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:39,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692580023] [2022-04-06 06:57:39,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692580023] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 06:57:39,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 06:57:39,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-04-06 06:57:39,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136242958] [2022-04-06 06:57:39,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:57:39,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 06:57:39,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 06:57:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:57:39,829 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 06:57:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:39,874 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-04-06 06:57:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:57:39,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-04-06 06:57:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:39,879 INFO L225 Difference]: With dead ends: 69 [2022-04-06 06:57:39,879 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 06:57:39,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:57:39,881 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:39,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:57:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 06:57:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 06:57:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 06:57:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-04-06 06:57:39,897 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 41 [2022-04-06 06:57:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:39,898 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-04-06 06:57:39,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 06:57:39,898 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-04-06 06:57:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 06:57:39,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:39,904 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:39,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:40,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:40,105 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2022-04-06 06:57:40,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:40,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658920941] [2022-04-06 06:57:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:40,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:40,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:40,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407033600] [2022-04-06 06:57:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:40,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:40,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:40,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 06:57:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:57:40,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:40,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:57:40,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:40,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658920941] [2022-04-06 06:57:40,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:40,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407033600] [2022-04-06 06:57:40,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407033600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:40,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:40,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 06:57:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963433626] [2022-04-06 06:57:40,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:40,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 06:57:40,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:40,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 06:57:40,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:57:40,391 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-04-06 06:57:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:40,509 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2022-04-06 06:57:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 06:57:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-04-06 06:57:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:40,511 INFO L225 Difference]: With dead ends: 137 [2022-04-06 06:57:40,511 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 06:57:40,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-06 06:57:40,512 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 73 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:40,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 173 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:57:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 06:57:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2022-04-06 06:57:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 22 states have call successors, (22), 13 states have call predecessors, (22), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 06:57:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 152 transitions. [2022-04-06 06:57:40,533 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 152 transitions. Word has length 43 [2022-04-06 06:57:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:40,534 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 152 transitions. [2022-04-06 06:57:40,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-04-06 06:57:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 152 transitions. [2022-04-06 06:57:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 06:57:40,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:40,539 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:40,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:40,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:40,759 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2022-04-06 06:57:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:40,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79839847] [2022-04-06 06:57:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:40,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:40,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:40,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301901980] [2022-04-06 06:57:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:40,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:40,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:40,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:40,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 06:57:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:40,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 06:57:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:57:40,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:57:40,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:40,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79839847] [2022-04-06 06:57:40,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:40,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301901980] [2022-04-06 06:57:40,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301901980] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:57:40,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:57:40,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 06:57:40,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520779775] [2022-04-06 06:57:40,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:57:40,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 06:57:40,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 06:57:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:57:40,909 INFO L87 Difference]: Start difference. First operand 123 states and 152 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:57:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:40,941 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2022-04-06 06:57:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 06:57:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-04-06 06:57:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:40,943 INFO L225 Difference]: With dead ends: 119 [2022-04-06 06:57:40,943 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 06:57:40,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:57:40,944 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:40,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 94 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:57:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 06:57:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-04-06 06:57:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 06:57:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-04-06 06:57:40,951 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-04-06 06:57:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:40,951 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-04-06 06:57:40,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:57:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-04-06 06:57:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 06:57:40,952 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:40,952 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:40,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:41,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-04-06 06:57:41,175 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:41,176 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2022-04-06 06:57:41,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:41,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843511826] [2022-04-06 06:57:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:41,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:41,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:41,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207391245] [2022-04-06 06:57:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:41,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:41,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:41,185 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:41,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 06:57:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:41,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 06:57:41,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:41,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:57:41,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:41,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843511826] [2022-04-06 06:57:41,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:41,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207391245] [2022-04-06 06:57:41,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207391245] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:41,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:41,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 06:57:41,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768692076] [2022-04-06 06:57:41,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:41,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 06:57:41,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:41,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 06:57:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:57:41,507 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-04-06 06:57:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:41,675 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2022-04-06 06:57:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 06:57:41,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-04-06 06:57:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:41,677 INFO L225 Difference]: With dead ends: 172 [2022-04-06 06:57:41,677 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 06:57:41,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-04-06 06:57:41,678 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 107 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:41,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 275 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:57:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 06:57:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-04-06 06:57:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 06:57:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-04-06 06:57:41,685 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-04-06 06:57:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:41,686 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-04-06 06:57:41,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-04-06 06:57:41,686 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-04-06 06:57:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 06:57:41,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:41,687 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:41,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:41,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:41,888 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:41,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2022-04-06 06:57:41,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:41,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66399517] [2022-04-06 06:57:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:41,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:41,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:41,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487870252] [2022-04-06 06:57:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:41,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:41,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:41,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:41,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 06:57:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:41,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 06:57:41,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:42,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 06:57:42,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:42,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66399517] [2022-04-06 06:57:42,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:42,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487870252] [2022-04-06 06:57:42,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487870252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:42,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:42,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 06:57:42,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223499654] [2022-04-06 06:57:42,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:42,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 06:57:42,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 06:57:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 06:57:42,269 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-06 06:57:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:42,491 INFO L93 Difference]: Finished difference Result 206 states and 267 transitions. [2022-04-06 06:57:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 06:57:42,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-04-06 06:57:42,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:42,493 INFO L225 Difference]: With dead ends: 206 [2022-04-06 06:57:42,493 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 06:57:42,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-04-06 06:57:42,494 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 199 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:42,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 243 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 06:57:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 06:57:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-04-06 06:57:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 06:57:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-04-06 06:57:42,502 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-04-06 06:57:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:42,502 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-04-06 06:57:42,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-06 06:57:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-04-06 06:57:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 06:57:42,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:42,504 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:42,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:42,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 06:57:42,705 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash -725338187, now seen corresponding path program 1 times [2022-04-06 06:57:42,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:42,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506478042] [2022-04-06 06:57:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:42,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:42,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:42,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572072435] [2022-04-06 06:57:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:42,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:42,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:42,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:42,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 06:57:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 06:57:42,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-04-06 06:57:42,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 06:57:43,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506478042] [2022-04-06 06:57:43,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572072435] [2022-04-06 06:57:43,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572072435] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:43,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:43,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-04-06 06:57:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957774420] [2022-04-06 06:57:43,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:43,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 06:57:43,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 06:57:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:57:43,094 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 06:57:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:43,143 INFO L93 Difference]: Finished difference Result 381 states and 522 transitions. [2022-04-06 06:57:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:57:43,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-04-06 06:57:43,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:43,146 INFO L225 Difference]: With dead ends: 381 [2022-04-06 06:57:43,146 INFO L226 Difference]: Without dead ends: 359 [2022-04-06 06:57:43,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:57:43,146 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:43,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 142 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:57:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-06 06:57:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-04-06 06:57:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-06 06:57:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-04-06 06:57:43,159 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-04-06 06:57:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:43,160 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-04-06 06:57:43,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 06:57:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-04-06 06:57:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 06:57:43,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:43,162 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:43,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:43,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 06:57:43,375 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1986043633, now seen corresponding path program 2 times [2022-04-06 06:57:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:43,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575491073] [2022-04-06 06:57:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:43,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:43,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157799935] [2022-04-06 06:57:43,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:57:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:43,389 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:43,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 06:57:43,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:57:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:57:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 06:57:43,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:57:43,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 06:57:43,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:43,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575491073] [2022-04-06 06:57:43,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:43,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157799935] [2022-04-06 06:57:43,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157799935] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:43,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:43,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 06:57:43,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986854488] [2022-04-06 06:57:43,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:43,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 06:57:43,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 06:57:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 06:57:43,941 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-04-06 06:57:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:44,476 INFO L93 Difference]: Finished difference Result 842 states and 1155 transitions. [2022-04-06 06:57:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 06:57:44,477 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) Word has length 91 [2022-04-06 06:57:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:44,481 INFO L225 Difference]: With dead ends: 842 [2022-04-06 06:57:44,481 INFO L226 Difference]: Without dead ends: 842 [2022-04-06 06:57:44,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 06:57:44,482 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 439 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:44,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 380 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 06:57:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-04-06 06:57:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 793. [2022-04-06 06:57:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 597 states have (on average 1.2680067001675042) internal successors, (757), 606 states have internal predecessors, (757), 177 states have call successors, (177), 20 states have call predecessors, (177), 18 states have return successors, (175), 166 states have call predecessors, (175), 175 states have call successors, (175) [2022-04-06 06:57:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1109 transitions. [2022-04-06 06:57:44,522 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1109 transitions. Word has length 91 [2022-04-06 06:57:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:44,522 INFO L478 AbstractCegarLoop]: Abstraction has 793 states and 1109 transitions. [2022-04-06 06:57:44,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-04-06 06:57:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1109 transitions. [2022-04-06 06:57:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 06:57:44,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:44,529 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:44,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:44,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 06:57:44,751 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 1 times [2022-04-06 06:57:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:44,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379107011] [2022-04-06 06:57:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:44,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:44,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104419181] [2022-04-06 06:57:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:44,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:44,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:44,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:44,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 06:57:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 06:57:44,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:45,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 06:57:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:45,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379107011] [2022-04-06 06:57:45,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104419181] [2022-04-06 06:57:45,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104419181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:45,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:45,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-06 06:57:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073454762] [2022-04-06 06:57:45,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:45,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 06:57:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:45,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 06:57:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 06:57:45,368 INFO L87 Difference]: Start difference. First operand 793 states and 1109 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-04-06 06:57:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:46,046 INFO L93 Difference]: Finished difference Result 819 states and 1083 transitions. [2022-04-06 06:57:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 06:57:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 97 [2022-04-06 06:57:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:46,050 INFO L225 Difference]: With dead ends: 819 [2022-04-06 06:57:46,050 INFO L226 Difference]: Without dead ends: 795 [2022-04-06 06:57:46,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 06:57:46,051 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 715 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:46,051 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 519 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 06:57:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-04-06 06:57:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 740. [2022-04-06 06:57:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 557 states have internal predecessors, (675), 164 states have call successors, (164), 24 states have call predecessors, (164), 22 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-06 06:57:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1001 transitions. [2022-04-06 06:57:46,072 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1001 transitions. Word has length 97 [2022-04-06 06:57:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:46,073 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 1001 transitions. [2022-04-06 06:57:46,073 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-04-06 06:57:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1001 transitions. [2022-04-06 06:57:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 06:57:46,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:46,074 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:46,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:46,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 06:57:46,287 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 1 times [2022-04-06 06:57:46,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:46,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54930034] [2022-04-06 06:57:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:46,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:46,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059984769] [2022-04-06 06:57:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:46,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:46,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:46,299 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:46,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 06:57:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 06:57:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:57:46,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 06:57:46,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:46,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54930034] [2022-04-06 06:57:46,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:46,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059984769] [2022-04-06 06:57:46,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059984769] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:46,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:46,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-06 06:57:46,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351065783] [2022-04-06 06:57:46,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:46,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 06:57:46,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:46,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 06:57:46,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 06:57:46,920 INFO L87 Difference]: Start difference. First operand 740 states and 1001 transitions. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 22 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) [2022-04-06 06:57:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:47,478 INFO L93 Difference]: Finished difference Result 752 states and 995 transitions. [2022-04-06 06:57:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 06:57:47,478 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 22 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) Word has length 103 [2022-04-06 06:57:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:47,481 INFO L225 Difference]: With dead ends: 752 [2022-04-06 06:57:47,482 INFO L226 Difference]: Without dead ends: 752 [2022-04-06 06:57:47,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=551, Invalid=1009, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 06:57:47,483 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 394 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:47,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 427 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 06:57:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-04-06 06:57:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 746. [2022-04-06 06:57:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 559 states have (on average 1.186046511627907) internal successors, (663), 561 states have internal predecessors, (663), 164 states have call successors, (164), 24 states have call predecessors, (164), 22 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-06 06:57:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 989 transitions. [2022-04-06 06:57:47,500 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 989 transitions. Word has length 103 [2022-04-06 06:57:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:47,501 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 989 transitions. [2022-04-06 06:57:47,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 22 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) [2022-04-06 06:57:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 989 transitions. [2022-04-06 06:57:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 06:57:47,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:47,504 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:47,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:47,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:47,728 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:47,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2108944290, now seen corresponding path program 3 times [2022-04-06 06:57:47,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:47,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283984158] [2022-04-06 06:57:47,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:47,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:47,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:47,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47591317] [2022-04-06 06:57:47,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 06:57:47,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:47,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:47,739 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:47,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 06:57:47,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 06:57:47,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:57:47,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 06:57:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2022-04-06 06:57:48,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:57:48,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283984158] [2022-04-06 06:57:48,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47591317] [2022-04-06 06:57:48,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47591317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:57:48,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:57:48,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 06:57:48,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814942295] [2022-04-06 06:57:48,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:57:48,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 06:57:48,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 06:57:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:57:48,085 INFO L87 Difference]: Start difference. First operand 746 states and 989 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 06:57:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:48,118 INFO L93 Difference]: Finished difference Result 831 states and 1084 transitions. [2022-04-06 06:57:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:57:48,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 173 [2022-04-06 06:57:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:48,121 INFO L225 Difference]: With dead ends: 831 [2022-04-06 06:57:48,122 INFO L226 Difference]: Without dead ends: 807 [2022-04-06 06:57:48,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 06:57:48,124 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:48,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:57:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-04-06 06:57:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 772. [2022-04-06 06:57:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 580 states have (on average 1.1741379310344828) internal successors, (681), 582 states have internal predecessors, (681), 166 states have call successors, (166), 27 states have call predecessors, (166), 25 states have return successors, (164), 162 states have call predecessors, (164), 164 states have call successors, (164) [2022-04-06 06:57:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1011 transitions. [2022-04-06 06:57:48,145 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1011 transitions. Word has length 173 [2022-04-06 06:57:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:48,145 INFO L478 AbstractCegarLoop]: Abstraction has 772 states and 1011 transitions. [2022-04-06 06:57:48,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 06:57:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1011 transitions. [2022-04-06 06:57:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 06:57:48,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:48,148 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:48,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:48,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 06:57:48,358 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:48,358 INFO L85 PathProgramCache]: Analyzing trace with hash -147451011, now seen corresponding path program 1 times [2022-04-06 06:57:48,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:48,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482928179] [2022-04-06 06:57:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:48,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:48,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:48,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539470234] [2022-04-06 06:57:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:48,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:48,375 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:48,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 06:57:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:57:48,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2022-04-06 06:57:48,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 546 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2022-04-06 06:57:48,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:57:48,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:48,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482928179] [2022-04-06 06:57:48,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:48,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539470234] [2022-04-06 06:57:48,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539470234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:57:48,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:57:48,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 06:57:48,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983484675] [2022-04-06 06:57:48,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:57:48,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 06:57:48,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:48,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 06:57:48,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:57:48,668 INFO L87 Difference]: Start difference. First operand 772 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-06 06:57:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:48,689 INFO L93 Difference]: Finished difference Result 964 states and 1259 transitions. [2022-04-06 06:57:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 06:57:48,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 177 [2022-04-06 06:57:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:48,693 INFO L225 Difference]: With dead ends: 964 [2022-04-06 06:57:48,693 INFO L226 Difference]: Without dead ends: 818 [2022-04-06 06:57:48,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:57:48,693 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:48,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:57:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-04-06 06:57:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 769. [2022-04-06 06:57:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 580 states have (on average 1.1706896551724137) internal successors, (679), 583 states have internal predecessors, (679), 163 states have call successors, (163), 27 states have call predecessors, (163), 25 states have return successors, (161), 158 states have call predecessors, (161), 161 states have call successors, (161) [2022-04-06 06:57:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1003 transitions. [2022-04-06 06:57:48,713 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1003 transitions. Word has length 177 [2022-04-06 06:57:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:48,714 INFO L478 AbstractCegarLoop]: Abstraction has 769 states and 1003 transitions. [2022-04-06 06:57:48,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-06 06:57:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1003 transitions. [2022-04-06 06:57:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 06:57:48,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:48,717 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 8, 8, 8, 8, 8, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:48,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:48,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 06:57:48,941 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1282959772, now seen corresponding path program 2 times [2022-04-06 06:57:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:48,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20047383] [2022-04-06 06:57:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:48,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:48,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:48,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500307083] [2022-04-06 06:57:48,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:57:48,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:48,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:48,978 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:48,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 06:57:49,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:57:49,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:57:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 06:57:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 226 proven. 726 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:57:49,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 94 proven. 182 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2022-04-06 06:57:49,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:49,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20047383] [2022-04-06 06:57:49,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:49,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500307083] [2022-04-06 06:57:49,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500307083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:49,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:49,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-04-06 06:57:49,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951152156] [2022-04-06 06:57:49,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:49,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 06:57:49,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:49,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 06:57:49,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 06:57:49,880 INFO L87 Difference]: Start difference. First operand 769 states and 1003 transitions. Second operand has 24 states, 24 states have (on average 7.625) internal successors, (183), 24 states have internal predecessors, (183), 22 states have call successors, (44), 20 states have call predecessors, (44), 20 states have return successors, (42), 21 states have call predecessors, (42), 22 states have call successors, (42) [2022-04-06 06:57:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:57:50,405 INFO L93 Difference]: Finished difference Result 762 states and 989 transitions. [2022-04-06 06:57:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 06:57:50,406 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 24 states have internal predecessors, (183), 22 states have call successors, (44), 20 states have call predecessors, (44), 20 states have return successors, (42), 21 states have call predecessors, (42), 22 states have call successors, (42) Word has length 177 [2022-04-06 06:57:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:57:50,408 INFO L225 Difference]: With dead ends: 762 [2022-04-06 06:57:50,408 INFO L226 Difference]: Without dead ends: 752 [2022-04-06 06:57:50,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=631, Invalid=1091, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 06:57:50,410 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 370 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 06:57:50,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 500 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 06:57:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-04-06 06:57:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 748. [2022-04-06 06:57:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 566 states have (on average 1.1607773851590106) internal successors, (657), 566 states have internal predecessors, (657), 158 states have call successors, (158), 25 states have call predecessors, (158), 23 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2022-04-06 06:57:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 971 transitions. [2022-04-06 06:57:50,427 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 971 transitions. Word has length 177 [2022-04-06 06:57:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:57:50,428 INFO L478 AbstractCegarLoop]: Abstraction has 748 states and 971 transitions. [2022-04-06 06:57:50,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 24 states have internal predecessors, (183), 22 states have call successors, (44), 20 states have call predecessors, (44), 20 states have return successors, (42), 21 states have call predecessors, (42), 22 states have call successors, (42) [2022-04-06 06:57:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 971 transitions. [2022-04-06 06:57:50,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 06:57:50,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:57:50,432 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:57:50,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 06:57:50,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 06:57:50,656 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:57:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:57:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash 529165983, now seen corresponding path program 2 times [2022-04-06 06:57:50,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:57:50,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824828816] [2022-04-06 06:57:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:57:50,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:57:50,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:57:50,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434411828] [2022-04-06 06:57:50,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:57:50,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:57:50,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:57:50,669 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:57:50,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 06:57:50,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:57:50,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:57:50,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 06:57:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:57:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 490 proven. 112 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-04-06 06:57:56,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 189 proven. 92 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2022-04-06 06:57:57,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:57,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824828816] [2022-04-06 06:57:57,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:57,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434411828] [2022-04-06 06:57:57,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434411828] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:57,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:57,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-04-06 06:57:57,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634595483] [2022-04-06 06:57:57,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:57,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 06:57:57,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:57,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 06:57:57,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=322, Unknown=1, NotChecked=0, Total=380 [2022-04-06 06:57:57,315 INFO L87 Difference]: Start difference. First operand 748 states and 971 transitions. Second operand has 20 states, 19 states have (on average 6.157894736842105) internal successors, (117), 17 states have internal predecessors, (117), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 17 states have call predecessors, (39), 15 states have call successors, (39) [2022-04-06 06:58:01,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:58:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:58:07,545 INFO L93 Difference]: Finished difference Result 1529 states and 2086 transitions. [2022-04-06 06:58:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 06:58:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.157894736842105) internal successors, (117), 17 states have internal predecessors, (117), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 17 states have call predecessors, (39), 15 states have call successors, (39) Word has length 183 [2022-04-06 06:58:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:58:07,551 INFO L225 Difference]: With dead ends: 1529 [2022-04-06 06:58:07,552 INFO L226 Difference]: Without dead ends: 1513 [2022-04-06 06:58:07,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 347 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=231, Invalid=1328, Unknown=1, NotChecked=0, Total=1560 [2022-04-06 06:58:07,553 INFO L913 BasicCegarLoop]: 201 mSDtfsCounter, 177 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 06:58:07,553 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1679 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 595 Invalid, 1 Unknown, 647 Unchecked, 4.2s Time] [2022-04-06 06:58:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2022-04-06 06:58:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1090. [2022-04-06 06:58:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 828 states have (on average 1.2016908212560387) internal successors, (995), 828 states have internal predecessors, (995), 238 states have call successors, (238), 25 states have call predecessors, (238), 23 states have return successors, (236), 236 states have call predecessors, (236), 236 states have call successors, (236) [2022-04-06 06:58:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1469 transitions. [2022-04-06 06:58:07,584 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1469 transitions. Word has length 183 [2022-04-06 06:58:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:58:07,584 INFO L478 AbstractCegarLoop]: Abstraction has 1090 states and 1469 transitions. [2022-04-06 06:58:07,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.157894736842105) internal successors, (117), 17 states have internal predecessors, (117), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 17 states have call predecessors, (39), 15 states have call successors, (39) [2022-04-06 06:58:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1469 transitions. [2022-04-06 06:58:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 06:58:07,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:58:07,588 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:58:07,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 06:58:07,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 06:58:07,807 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:58:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:58:07,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1607491483, now seen corresponding path program 3 times [2022-04-06 06:58:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:58:07,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955254583] [2022-04-06 06:58:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:58:07,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:58:07,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:58:07,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858855839] [2022-04-06 06:58:07,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 06:58:07,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:58:07,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:58:07,822 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:58:07,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 06:58:07,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 06:58:07,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:58:07,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 06:58:07,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:58:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 128 proven. 1 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-04-06 06:58:08,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:58:12,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:58:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955254583] [2022-04-06 06:58:12,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:58:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858855839] [2022-04-06 06:58:12,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858855839] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 06:58:12,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 06:58:12,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 06:58:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756307401] [2022-04-06 06:58:12,390 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 06:58:12,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 06:58:12,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:58:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 06:58:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=83, Unknown=2, NotChecked=0, Total=110 [2022-04-06 06:58:12,391 INFO L87 Difference]: Start difference. First operand 1090 states and 1469 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 06:58:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:58:12,541 INFO L93 Difference]: Finished difference Result 1150 states and 1548 transitions. [2022-04-06 06:58:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 06:58:12,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 183 [2022-04-06 06:58:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:58:12,546 INFO L225 Difference]: With dead ends: 1150 [2022-04-06 06:58:12,546 INFO L226 Difference]: Without dead ends: 1117 [2022-04-06 06:58:12,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=43, Invalid=137, Unknown=2, NotChecked=0, Total=182 [2022-04-06 06:58:12,547 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:58:12,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 253 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:58:12,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-04-06 06:58:12,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1057. [2022-04-06 06:58:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 797 states have (on average 1.191969887076537) internal successors, (950), 808 states have internal predecessors, (950), 234 states have call successors, (234), 27 states have call predecessors, (234), 25 states have return successors, (232), 221 states have call predecessors, (232), 232 states have call successors, (232) [2022-04-06 06:58:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1416 transitions. [2022-04-06 06:58:12,572 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1416 transitions. Word has length 183 [2022-04-06 06:58:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:58:12,573 INFO L478 AbstractCegarLoop]: Abstraction has 1057 states and 1416 transitions. [2022-04-06 06:58:12,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 06:58:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1416 transitions. [2022-04-06 06:58:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 06:58:12,576 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:58:12,576 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 10, 10, 10, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:58:12,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 06:58:12,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:58:12,783 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:58:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:58:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash -310501698, now seen corresponding path program 4 times [2022-04-06 06:58:12,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:58:12,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800466180] [2022-04-06 06:58:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:58:12,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:58:12,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:58:12,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774152765] [2022-04-06 06:58:12,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 06:58:12,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:58:12,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:58:12,797 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:58:12,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 06:58:12,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 06:58:12,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:58:12,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 06:58:12,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:58:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 402 proven. 144 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-04-06 06:58:13,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:58:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 142 proven. 156 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2022-04-06 06:58:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:58:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800466180] [2022-04-06 06:58:13,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:58:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774152765] [2022-04-06 06:58:13,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774152765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:58:13,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:58:13,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 06:58:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402960154] [2022-04-06 06:58:13,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:58:13,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 06:58:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:58:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 06:58:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-04-06 06:58:13,727 INFO L87 Difference]: Start difference. First operand 1057 states and 1416 transitions. Second operand has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 18 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 18 states have call predecessors, (37), 18 states have call successors, (37) [2022-04-06 06:58:14,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:58:14,862 INFO L93 Difference]: Finished difference Result 1827 states and 2442 transitions. [2022-04-06 06:58:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 06:58:14,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 18 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 18 states have call predecessors, (37), 18 states have call successors, (37) Word has length 183 [2022-04-06 06:58:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:58:14,867 INFO L225 Difference]: With dead ends: 1827 [2022-04-06 06:58:14,867 INFO L226 Difference]: Without dead ends: 1822 [2022-04-06 06:58:14,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 06:58:14,868 INFO L913 BasicCegarLoop]: 168 mSDtfsCounter, 216 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 06:58:14,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 842 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 06:58:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-04-06 06:58:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1329. [2022-04-06 06:58:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1004 states have (on average 1.1643426294820718) internal successors, (1169), 1015 states have internal predecessors, (1169), 299 states have call successors, (299), 27 states have call predecessors, (299), 25 states have return successors, (297), 286 states have call predecessors, (297), 297 states have call successors, (297) [2022-04-06 06:58:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1765 transitions. [2022-04-06 06:58:14,905 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1765 transitions. Word has length 183 [2022-04-06 06:58:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:58:14,905 INFO L478 AbstractCegarLoop]: Abstraction has 1329 states and 1765 transitions. [2022-04-06 06:58:14,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 18 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 18 states have call predecessors, (37), 18 states have call successors, (37) [2022-04-06 06:58:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1765 transitions. [2022-04-06 06:58:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 06:58:14,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:58:14,910 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:58:14,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 06:58:15,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:58:15,123 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:58:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:58:15,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1584301742, now seen corresponding path program 5 times [2022-04-06 06:58:15,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:58:15,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969318818] [2022-04-06 06:58:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:58:15,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:58:15,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:58:15,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053606799] [2022-04-06 06:58:15,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 06:58:15,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:58:15,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:58:15,132 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:58:15,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 06:58:15,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-04-06 06:58:15,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 06:58:15,543 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 06:58:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 06:58:15,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 06:58:15,662 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 06:58:15,663 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 06:58:15,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 06:58:15,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:58:15,874 INFO L719 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:58:15,877 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 06:58:15,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:58:15 BasicIcfg [2022-04-06 06:58:15,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 06:58:15,937 INFO L158 Benchmark]: Toolchain (without parser) took 58629.02ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 125.0MB in the beginning and 122.6MB in the end (delta: 2.3MB). Peak memory consumption was 38.2MB. Max. memory is 8.0GB. [2022-04-06 06:58:15,937 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 176.2MB. Free memory is still 142.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 06:58:15,938 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.14ms. Allocated memory is still 176.2MB. Free memory was 124.8MB in the beginning and 152.5MB in the end (delta: -27.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 06:58:15,938 INFO L158 Benchmark]: Boogie Preprocessor took 26.62ms. Allocated memory is still 176.2MB. Free memory was 152.5MB in the beginning and 150.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 06:58:15,938 INFO L158 Benchmark]: RCFGBuilder took 261.04ms. Allocated memory is still 176.2MB. Free memory was 150.8MB in the beginning and 139.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 06:58:15,938 INFO L158 Benchmark]: IcfgTransformer took 24.37ms. Allocated memory is still 176.2MB. Free memory was 139.9MB in the beginning and 138.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 06:58:15,939 INFO L158 Benchmark]: TraceAbstraction took 58115.71ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 138.1MB in the beginning and 122.6MB in the end (delta: 15.4MB). Peak memory consumption was 51.9MB. Max. memory is 8.0GB. [2022-04-06 06:58:15,940 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 176.2MB. Free memory is still 142.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.14ms. Allocated memory is still 176.2MB. Free memory was 124.8MB in the beginning and 152.5MB in the end (delta: -27.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.62ms. Allocated memory is still 176.2MB. Free memory was 152.5MB in the beginning and 150.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 261.04ms. Allocated memory is still 176.2MB. Free memory was 150.8MB in the beginning and 139.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 24.37ms. Allocated memory is still 176.2MB. Free memory was 139.9MB in the beginning and 138.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 58115.71ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 138.1MB in the beginning and 122.6MB in the end (delta: 15.4MB). Peak memory consumption was 51.9MB. 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=26, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=573, counter=0, R=23] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=573, counter=0, R=23] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=573, counter=0, R=23, r=-44, u=47, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=1, counter++=0, r=-44, R=23, u=47, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=1, R=23, r=-44, u=47, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=573, counter=1, r=-44, R=23, u=47, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=2, counter++=1, r=-44, R=23, u=47, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=2, R=23, r=-44, u=47, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=573, counter=2, R=23, r=-44, u=47, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=3, counter++=2, r=-44, R=23, u=47, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=3, r=-44, R=23, u=47, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=573, counter=3, r=3, R=23, u=49, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=4, counter++=3, R=23, r=3, u=49, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=4, R=23, r=3, u=49, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=573, counter=4, R=23, r=3, u=49, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=5, counter++=4, r=3, R=23, u=49, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=5, r=3, R=23, u=49, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=573, counter=5, r=3, R=23, u=49, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=6, counter++=5, R=23, r=3, u=49, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=6, r=3, R=23, u=49, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=6, r=2, R=23, u=49, v=3] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=7, counter++=6, r=2, R=23, u=49, v=3] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=7, r=2, R=23, u=49, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=7, r=-1, R=23, u=49, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=8, counter++=7, r=-1, R=23, u=49, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=8, R=23, r=-1, u=49, v=5] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=573, counter=8, R=23, r=-1, u=49, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=9, counter++=8, r=-1, R=23, u=49, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=9, r=-1, R=23, u=49, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=573, counter=9, R=23, r=48, u=51, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=10, counter++=9, R=23, r=48, u=51, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=10, r=48, R=23, u=51, v=5] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=573, counter=10, r=48, R=23, u=51, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=11, counter++=10, R=23, r=48, u=51, v=5] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=11, r=48, R=23, u=51, v=5] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=573, counter=11, r=48, R=23, u=51, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=12, counter++=11, r=48, R=23, u=51, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=12, R=23, r=48, u=51, v=5] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=12, r=43, R=23, u=51, v=7] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=13, counter++=12, r=43, R=23, u=51, v=7] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=13, r=43, R=23, u=51, v=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=13, r=36, R=23, u=51, v=9] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=14, counter++=13, r=36, R=23, u=51, v=9] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=14, R=23, r=36, u=51, v=9] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=14, r=27, R=23, u=51, v=11] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=15, counter++=14, r=27, R=23, u=51, v=11] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=15, r=27, R=23, u=51, v=11] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=15, r=16, R=23, u=51, v=13] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=16, counter++=15, R=23, r=16, u=51, v=13] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=16, r=16, R=23, u=51, v=13] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=16, r=3, R=23, u=51, v=15] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=17, counter++=16, R=23, r=3, u=51, v=15] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=17, r=3, R=23, u=51, v=15] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=17, r=-12, R=23, u=51, v=17] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=18, counter++=17, r=-12, R=23, u=51, v=17] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=18, R=23, r=-12, u=51, v=17] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=573, counter=18, r=-12, R=23, u=51, v=17] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=19, counter++=18, r=-12, R=23, u=51, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=19, r=-12, R=23, u=51, v=17] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=573, counter=19, R=23, r=39, u=53, v=17] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=20, counter++=19, r=39, R=23, u=53, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=20, r=39, R=23, u=53, v=17] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=573, counter=20, R=23, r=39, u=53, v=17] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=21, counter++=20, r=39, R=23, u=53, v=17] [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 58.0s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 22.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 2873 SdHoareTripleChecker+Valid, 14.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2853 mSDsluCounter, 6461 SdHoareTripleChecker+Invalid, 13.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 647 IncrementalHoareTripleChecker+Unchecked, 5109 mSDsCounter, 1762 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3324 IncrementalHoareTripleChecker+Invalid, 5736 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1762 mSolverCounterUnsat, 1352 mSDtfsCounter, 3324 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3087 GetRequests, 2760 SyntacticMatches, 9 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 22.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1329occurred in iteration=20, InterpolantAutomatonStates: 315, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 1244 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 28.7s InterpolantComputationTime, 2008 NumberOfCodeBlocks, 1737 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2935 ConstructedInterpolants, 44 QuantifiedInterpolants, 10300 SizeOfPredicates, 86 NumberOfNonLiveVariables, 4126 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 8903/11070 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 RESULT: Ultimate proved your program to be incorrect! [2022-04-06 06:58:16,008 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...