/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/egcd2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 19:16:26,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 19:16:26,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 19:16:26,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 19:16:26,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 19:16:26,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 19:16:26,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 19:16:26,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 19:16:26,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 19:16:26,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 19:16:26,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 19:16:26,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 19:16:26,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 19:16:26,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 19:16:26,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 19:16:26,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 19:16:26,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 19:16:26,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 19:16:26,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 19:16:26,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 19:16:26,406 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 19:16:26,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 19:16:26,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 19:16:26,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 19:16:26,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 19:16:26,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 19:16:26,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 19:16:26,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 19:16:26,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 19:16:26,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 19:16:26,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 19:16:26,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 19:16:26,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 19:16:26,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 19:16:26,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 19:16:26,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 19:16:26,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 19:16:26,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 19:16:26,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 19:16:26,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 19:16:26,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 19:16:26,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 19:16:26,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 19:16:26,438 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 19:16:26,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 19:16:26,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 19:16:26,440 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 19:16:26,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 19:16:26,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 19:16:26,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 19:16:26,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 19:16:26,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 19:16:26,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 19:16:26,442 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 19:16:26,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 19:16:26,442 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 19:16:26,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 19:16:26,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 19:16:26,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 19:16:26,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 19:16:26,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 19:16:26,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:16:26,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 19:16:26,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 19:16:26,444 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 19:16:26,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 19:16:26,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 19:16:26,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 19:16:26,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 19:16:26,700 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 19:16:26,701 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 19:16:26,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-03-18 19:16:26,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69c3e4551/95664794b63249b4a3a8ba478a0a53a3/FLAGc114d7699 [2022-03-18 19:16:27,150 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 19:16:27,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-03-18 19:16:27,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69c3e4551/95664794b63249b4a3a8ba478a0a53a3/FLAGc114d7699 [2022-03-18 19:16:27,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69c3e4551/95664794b63249b4a3a8ba478a0a53a3 [2022-03-18 19:16:27,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 19:16:27,173 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 19:16:27,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 19:16:27,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 19:16:27,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 19:16:27,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6834e4e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27, skipping insertion in model container [2022-03-18 19:16:27,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 19:16:27,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 19:16:27,332 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-03-18 19:16:27,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:16:27,355 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 19:16:27,365 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-03-18 19:16:27,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:16:27,384 INFO L208 MainTranslator]: Completed translation [2022-03-18 19:16:27,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27 WrapperNode [2022-03-18 19:16:27,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 19:16:27,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 19:16:27,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 19:16:27,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 19:16:27,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 19:16:27,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 19:16:27,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 19:16:27,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 19:16:27,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:16:27,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:27,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 19:16:27,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 19:16:27,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 19:16:27,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 19:16:27,477 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 19:16:27,478 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 19:16:27,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 19:16:27,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 19:16:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 19:16:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 19:16:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 19:16:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 19:16:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 19:16:27,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 19:16:27,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 19:16:27,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 19:16:27,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 19:16:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 19:16:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 19:16:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 19:16:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 19:16:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 19:16:27,536 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 19:16:27,538 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 19:16:27,669 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 19:16:27,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 19:16:27,675 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 19:16:27,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:16:27 BoogieIcfgContainer [2022-03-18 19:16:27,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 19:16:27,677 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 19:16:27,677 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 19:16:27,678 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 19:16:27,691 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:16:27" (1/1) ... [2022-03-18 19:16:27,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:16:27 BasicIcfg [2022-03-18 19:16:27,725 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 19:16:27,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 19:16:27,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 19:16:27,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 19:16:27,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 07:16:27" (1/4) ... [2022-03-18 19:16:27,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4860daaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:16:27, skipping insertion in model container [2022-03-18 19:16:27,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:16:27" (2/4) ... [2022-03-18 19:16:27,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4860daaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:16:27, skipping insertion in model container [2022-03-18 19:16:27,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:16:27" (3/4) ... [2022-03-18 19:16:27,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4860daaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:16:27, skipping insertion in model container [2022-03-18 19:16:27,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:16:27" (4/4) ... [2022-03-18 19:16:27,746 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.cJordan [2022-03-18 19:16:27,750 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 19:16:27,750 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 19:16:27,808 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 19:16:27,813 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 [2022-03-18 19:16:27,814 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 19:16:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 19:16:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 19:16:27,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:27,850 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:27,850 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-03-18 19:16:27,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:27,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032448440] [2022-03-18 19:16:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:27,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:28,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:16:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:28,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:16:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 19:16:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 19:16:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:28,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 19:16:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:28,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 19:16:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 19:16:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 19:16:28,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032448440] [2022-03-18 19:16:28,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032448440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:16:28,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:16:28,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 19:16:28,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345986152] [2022-03-18 19:16:28,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:16:28,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 19:16:28,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 19:16:28,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:16:28,121 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 19:16:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:28,222 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-03-18 19:16:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 19:16:28,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 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 43 [2022-03-18 19:16:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:28,230 INFO L225 Difference]: With dead ends: 40 [2022-03-18 19:16:28,230 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 19:16:28,231 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:16:28,234 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:28,235 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:16:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 19:16:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 19:16:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 19:16:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-18 19:16:28,265 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-18 19:16:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:28,265 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-18 19:16:28,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 19:16:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-18 19:16:28,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 19:16:28,267 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:28,267 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:28,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 19:16:28,268 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-03-18 19:16:28,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:28,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622458185] [2022-03-18 19:16:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:28,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:28,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:28,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833304997] [2022-03-18 19:16:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:28,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:28,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:28,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:28,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 19:16:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:28,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:16:28,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 19:16:28,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 19:16:28,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:28,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622458185] [2022-03-18 19:16:28,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:28,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833304997] [2022-03-18 19:16:28,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833304997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:16:28,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:16:28,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-18 19:16:28,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703772020] [2022-03-18 19:16:28,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:28,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 19:16:28,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 19:16:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 19:16:28,706 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 19:16:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:28,815 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-03-18 19:16:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 19:16:28,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-18 19:16:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:28,819 INFO L225 Difference]: With dead ends: 44 [2022-03-18 19:16:28,819 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 19:16:28,820 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 19:16:28,822 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:28,823 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:16:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 19:16:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-18 19:16:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 19:16:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-18 19:16:28,839 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-18 19:16:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:28,840 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-18 19:16:28,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 19:16:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-18 19:16:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 19:16:28,841 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:28,841 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:28,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:29,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:29,063 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:29,063 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-03-18 19:16:29,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:29,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203685592] [2022-03-18 19:16:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:29,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:29,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:29,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748809516] [2022-03-18 19:16:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:29,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:29,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 19:16:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:29,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 19:16:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 19:16:29,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 19:16:29,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:29,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203685592] [2022-03-18 19:16:29,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:29,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748809516] [2022-03-18 19:16:29,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748809516] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 19:16:29,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:16:29,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 19:16:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681225509] [2022-03-18 19:16:29,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:16:29,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:16:29,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:16:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:16:29,466 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 19:16:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:29,503 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-03-18 19:16:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:16:29,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-18 19:16:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:29,505 INFO L225 Difference]: With dead ends: 41 [2022-03-18 19:16:29,505 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 19:16:29,506 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:16:29,508 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:29,510 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:16:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 19:16:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 19:16:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 19:16:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-18 19:16:29,522 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-03-18 19:16:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:29,522 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-18 19:16:29,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 19:16:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-18 19:16:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 19:16:29,524 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:29,524 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:29,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 19:16:29,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 19:16:29,748 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-03-18 19:16:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529150138] [2022-03-18 19:16:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:29,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:29,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:29,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823848223] [2022-03-18 19:16:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:29,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:29,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:29,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:29,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 19:16:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:29,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 19:16:29,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 19:16:30,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:30,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529150138] [2022-03-18 19:16:30,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823848223] [2022-03-18 19:16:30,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823848223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 19:16:30,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:16:30,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 19:16:30,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319877290] [2022-03-18 19:16:30,119 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:30,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 19:16:30,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 19:16:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:16:30,121 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 19:16:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:30,272 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-18 19:16:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 19:16:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 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 50 [2022-03-18 19:16:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:30,274 INFO L225 Difference]: With dead ends: 52 [2022-03-18 19:16:30,274 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 19:16:30,274 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:16:30,275 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:30,275 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:16:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 19:16:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-18 19:16:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 19:16:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-03-18 19:16:30,281 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-03-18 19:16:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:30,281 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-03-18 19:16:30,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 19:16:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-03-18 19:16:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 19:16:30,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:30,283 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:30,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:30,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:30,500 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-03-18 19:16:30,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:30,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713337901] [2022-03-18 19:16:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:30,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:30,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:30,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339455328] [2022-03-18 19:16:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:30,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:30,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:30,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:30,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 19:16:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:30,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 19:16:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 19:16:30,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 19:16:30,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713337901] [2022-03-18 19:16:30,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339455328] [2022-03-18 19:16:30,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339455328] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 19:16:30,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:16:30,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 19:16:30,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555876264] [2022-03-18 19:16:30,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:16:30,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:16:30,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:16:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:16:30,924 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 19:16:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:30,965 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-03-18 19:16:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:16:30,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-18 19:16:30,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:30,967 INFO L225 Difference]: With dead ends: 56 [2022-03-18 19:16:30,967 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 19:16:30,967 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:16:30,968 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:30,968 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:16:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 19:16:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-18 19:16:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 19:16:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-18 19:16:30,973 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-03-18 19:16:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:30,974 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-18 19:16:30,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 19:16:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-18 19:16:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 19:16:30,975 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:30,975 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:30,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:31,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:31,187 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-03-18 19:16:31,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:31,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006856749] [2022-03-18 19:16:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:31,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:31,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:31,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334346961] [2022-03-18 19:16:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:31,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:31,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:31,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:31,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 19:16:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:31,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 19:16:31,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 19:16:31,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:31,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:31,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006856749] [2022-03-18 19:16:31,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:31,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334346961] [2022-03-18 19:16:31,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334346961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 19:16:31,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:16:31,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 19:16:31,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73057225] [2022-03-18 19:16:31,556 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:31,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 19:16:31,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 19:16:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 19:16:31,557 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 19:16:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:31,654 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-03-18 19:16:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 19:16:31,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-18 19:16:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:31,656 INFO L225 Difference]: With dead ends: 60 [2022-03-18 19:16:31,656 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 19:16:31,656 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:16:31,657 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:31,657 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:16:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 19:16:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-18 19:16:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 19:16:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-18 19:16:31,662 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-03-18 19:16:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:31,662 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-18 19:16:31,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 19:16:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-18 19:16:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 19:16:31,663 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:31,664 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:31,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:31,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:31,865 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:31,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:31,865 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-03-18 19:16:31,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:31,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121427559] [2022-03-18 19:16:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:31,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:31,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:31,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509755521] [2022-03-18 19:16:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:31,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:31,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:31,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:31,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 19:16:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 19:16:31,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 19:16:32,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 19:16:32,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:32,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121427559] [2022-03-18 19:16:32,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:32,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509755521] [2022-03-18 19:16:32,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509755521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:16:32,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:16:32,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 19:16:32,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317826841] [2022-03-18 19:16:32,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:32,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 19:16:32,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 19:16:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 19:16:32,188 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 19:16:32,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:32,311 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-03-18 19:16:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 19:16:32,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-18 19:16:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:32,315 INFO L225 Difference]: With dead ends: 98 [2022-03-18 19:16:32,315 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 19:16:32,315 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:16:32,316 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:32,316 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 281 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:16:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 19:16:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-18 19:16:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 19:16:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-18 19:16:32,325 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-18 19:16:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:32,325 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-18 19:16:32,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 19:16:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-18 19:16:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 19:16:32,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:32,326 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1] [2022-03-18 19:16:32,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:32,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:32,527 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-03-18 19:16:32,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:32,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550244686] [2022-03-18 19:16:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:32,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:32,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:32,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423150243] [2022-03-18 19:16:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:32,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:32,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:32,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 19:16:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 19:16:32,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 19:16:32,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 19:16:32,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550244686] [2022-03-18 19:16:32,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423150243] [2022-03-18 19:16:32,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423150243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:16:32,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:16:32,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 19:16:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444395758] [2022-03-18 19:16:32,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:32,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 19:16:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 19:16:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:16:32,929 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 19:16:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:33,116 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2022-03-18 19:16:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 19:16:33,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-03-18 19:16:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:33,119 INFO L225 Difference]: With dead ends: 130 [2022-03-18 19:16:33,120 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 19:16:33,120 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-18 19:16:33,120 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:33,121 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 329 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:16:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 19:16:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-03-18 19:16:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 19:16:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-03-18 19:16:33,130 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-03-18 19:16:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:33,130 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-03-18 19:16:33,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 19:16:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-03-18 19:16:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 19:16:33,131 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:33,131 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1] [2022-03-18 19:16:33,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:33,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:33,355 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-03-18 19:16:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:33,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303576445] [2022-03-18 19:16:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:33,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:33,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:33,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603931084] [2022-03-18 19:16:33,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:16:33,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:33,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:33,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 19:16:33,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:16:33,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:16:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 19:16:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-18 19:16:33,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-18 19:16:34,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:34,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303576445] [2022-03-18 19:16:34,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:34,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603931084] [2022-03-18 19:16:34,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603931084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:16:34,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:16:34,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-18 19:16:34,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672820005] [2022-03-18 19:16:34,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:34,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 19:16:34,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:34,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 19:16:34,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-18 19:16:34,147 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-18 19:16:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:35,491 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2022-03-18 19:16:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 19:16:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-03-18 19:16:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:35,493 INFO L225 Difference]: With dead ends: 126 [2022-03-18 19:16:35,493 INFO L226 Difference]: Without dead ends: 126 [2022-03-18 19:16:35,493 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-18 19:16:35,494 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:35,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 330 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 19:16:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-18 19:16:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-03-18 19:16:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 19:16:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-03-18 19:16:35,502 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-03-18 19:16:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:35,502 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-03-18 19:16:35,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-18 19:16:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-03-18 19:16:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 19:16:35,504 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:35,504 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:35,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:35,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 19:16:35,716 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:35,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-03-18 19:16:35,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:35,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96253483] [2022-03-18 19:16:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:35,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:35,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:35,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924115224] [2022-03-18 19:16:35,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 19:16:35,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:35,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:35,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:35,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 19:16:35,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 19:16:35,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:16:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 19:16:35,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-18 19:16:36,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:36,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96253483] [2022-03-18 19:16:36,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924115224] [2022-03-18 19:16:36,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924115224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 19:16:36,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:16:36,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 19:16:36,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668339999] [2022-03-18 19:16:36,307 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:36,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 19:16:36,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:36,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 19:16:36,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:16:36,309 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-18 19:16:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:36,476 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-03-18 19:16:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 19:16:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-03-18 19:16:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:36,478 INFO L225 Difference]: With dead ends: 142 [2022-03-18 19:16:36,479 INFO L226 Difference]: Without dead ends: 142 [2022-03-18 19:16:36,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:16:36,479 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:36,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:16:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-18 19:16:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-18 19:16:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-18 19:16:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-03-18 19:16:36,488 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-03-18 19:16:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:36,488 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-03-18 19:16:36,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-18 19:16:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-03-18 19:16:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 19:16:36,489 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:36,489 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:36,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 19:16:36,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 19:16:36,708 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:36,708 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-03-18 19:16:36,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:36,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231658101] [2022-03-18 19:16:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:36,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:36,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:36,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752348006] [2022-03-18 19:16:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:36,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:36,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:36,724 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:36,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 19:16:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:36,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 19:16:36,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 19:16:37,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 19:16:37,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:37,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231658101] [2022-03-18 19:16:37,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:37,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752348006] [2022-03-18 19:16:37,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752348006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:16:37,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:16:37,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 19:16:37,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426723177] [2022-03-18 19:16:37,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:37,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 19:16:37,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:37,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 19:16:37,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:16:37,663 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-18 19:16:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:39,789 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-03-18 19:16:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 19:16:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-03-18 19:16:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:39,791 INFO L225 Difference]: With dead ends: 226 [2022-03-18 19:16:39,791 INFO L226 Difference]: Without dead ends: 220 [2022-03-18 19:16:39,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-18 19:16:39,792 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:39,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 402 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 19:16:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-18 19:16:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-18 19:16:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-18 19:16:39,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-03-18 19:16:39,826 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-03-18 19:16:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:39,826 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-03-18 19:16:39,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-18 19:16:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-03-18 19:16:39,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 19:16:39,828 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:39,828 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:39,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:40,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 19:16:40,053 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-03-18 19:16:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:40,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236892930] [2022-03-18 19:16:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:40,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:40,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:40,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557135962] [2022-03-18 19:16:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:40,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:40,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:40,075 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:40,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 19:16:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:16:40,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 19:16:40,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-18 19:16:40,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:40,972 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 19:16:47,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:47,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236892930] [2022-03-18 19:16:47,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:47,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557135962] [2022-03-18 19:16:47,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557135962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 19:16:47,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:16:47,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 19:16:47,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067194979] [2022-03-18 19:16:47,794 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:47,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 19:16:47,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:47,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 19:16:47,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=211, Unknown=1, NotChecked=0, Total=272 [2022-03-18 19:16:47,795 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 19:16:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:48,422 INFO L93 Difference]: Finished difference Result 224 states and 304 transitions. [2022-03-18 19:16:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 19:16:48,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 107 [2022-03-18 19:16:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:48,424 INFO L225 Difference]: With dead ends: 224 [2022-03-18 19:16:48,424 INFO L226 Difference]: Without dead ends: 224 [2022-03-18 19:16:48,425 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=90, Invalid=329, Unknown=1, NotChecked=0, Total=420 [2022-03-18 19:16:48,425 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:48,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 403 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 19:16:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-18 19:16:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2022-03-18 19:16:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 120 states have internal predecessors, (140), 81 states have call successors, (81), 20 states have call predecessors, (81), 19 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-18 19:16:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 300 transitions. [2022-03-18 19:16:48,439 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 300 transitions. Word has length 107 [2022-03-18 19:16:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:48,440 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 300 transitions. [2022-03-18 19:16:48,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 19:16:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 300 transitions. [2022-03-18 19:16:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 19:16:48,441 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:48,441 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:48,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:48,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 19:16:48,645 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash -426906627, now seen corresponding path program 4 times [2022-03-18 19:16:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192182466] [2022-03-18 19:16:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:48,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:48,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935615670] [2022-03-18 19:16:48,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 19:16:48,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:48,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:48,664 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:48,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 19:16:48,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 19:16:48,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:16:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 19:16:48,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-18 19:16:48,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:16:48,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:48,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192182466] [2022-03-18 19:16:48,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:48,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935615670] [2022-03-18 19:16:48,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935615670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:16:48,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:16:48,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:16:48,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862670970] [2022-03-18 19:16:48,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:16:48,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:16:48,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:48,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:16:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:16:48,875 INFO L87 Difference]: Start difference. First operand 220 states and 300 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-18 19:16:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:48,920 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2022-03-18 19:16:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 19:16:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-03-18 19:16:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:48,922 INFO L225 Difference]: With dead ends: 201 [2022-03-18 19:16:48,922 INFO L226 Difference]: Without dead ends: 201 [2022-03-18 19:16:48,922 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 19:16:48,922 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:48,923 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:16:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-18 19:16:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2022-03-18 19:16:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 19:16:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-03-18 19:16:48,929 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 110 [2022-03-18 19:16:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:48,930 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-03-18 19:16:48,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-18 19:16:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-03-18 19:16:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 19:16:48,931 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:48,931 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:48,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-18 19:16:49,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 19:16:49,146 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 2 times [2022-03-18 19:16:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:49,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866925125] [2022-03-18 19:16:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:49,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:49,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:49,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324235176] [2022-03-18 19:16:49,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:16:49,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:49,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:49,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:49,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 19:16:49,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:16:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:16:49,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 19:16:49,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-03-18 19:16:49,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:16:52,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:16:52,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866925125] [2022-03-18 19:16:52,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:16:52,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324235176] [2022-03-18 19:16:52,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324235176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 19:16:52,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:16:52,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 19:16:52,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199285141] [2022-03-18 19:16:52,434 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 19:16:52,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 19:16:52,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:16:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 19:16:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2022-03-18 19:16:52,436 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-18 19:16:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:16:52,746 INFO L93 Difference]: Finished difference Result 193 states and 250 transitions. [2022-03-18 19:16:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 19:16:52,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 129 [2022-03-18 19:16:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:16:52,750 INFO L225 Difference]: With dead ends: 193 [2022-03-18 19:16:52,750 INFO L226 Difference]: Without dead ends: 193 [2022-03-18 19:16:52,751 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2022-03-18 19:16:52,751 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 19:16:52,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 264 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 19:16:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-18 19:16:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2022-03-18 19:16:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 19:16:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2022-03-18 19:16:52,759 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 129 [2022-03-18 19:16:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:16:52,760 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2022-03-18 19:16:52,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-18 19:16:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2022-03-18 19:16:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 19:16:52,762 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:16:52,762 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:16:52,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 19:16:52,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 19:16:52,987 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:16:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:16:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 3 times [2022-03-18 19:16:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:16:52,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231012992] [2022-03-18 19:16:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:16:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:16:52,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:16:52,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049220036] [2022-03-18 19:16:52,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 19:16:52,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:16:52,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:16:52,996 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:16:52,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 19:16:53,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 19:16:53,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:16:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 19:16:53,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:16:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 100 proven. 48 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-03-18 19:16:54,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:17:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 101 proven. 47 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-03-18 19:17:33,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:17:33,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231012992] [2022-03-18 19:17:33,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:17:33,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049220036] [2022-03-18 19:17:33,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049220036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:17:33,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:17:33,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-18 19:17:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442209637] [2022-03-18 19:17:33,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:17:33,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 19:17:33,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:17:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 19:17:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=351, Unknown=5, NotChecked=0, Total=462 [2022-03-18 19:17:33,304 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-03-18 19:17:35,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:17:37,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:17:39,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:18:00,651 WARN L232 SmtUtils]: Spent 17.08s on a formula simplification that was a NOOP. DAG size: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:18:38,986 WARN L232 SmtUtils]: Spent 34.42s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:18:41,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:18:43,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:18:45,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:18:54,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:18:57,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:18:59,869 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:03,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:05,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:10,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:14,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:16,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:21,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:19:21,273 INFO L93 Difference]: Finished difference Result 246 states and 322 transitions. [2022-03-18 19:19:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 19:19:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 132 [2022-03-18 19:19:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:19:21,274 INFO L225 Difference]: With dead ends: 246 [2022-03-18 19:19:21,274 INFO L226 Difference]: Without dead ends: 246 [2022-03-18 19:19:21,275 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 242 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 91.6s TimeCoverageRelationStatistics Valid=299, Invalid=882, Unknown=9, NotChecked=0, Total=1190 [2022-03-18 19:19:21,275 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 115 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 190 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.4s IncrementalHoareTripleChecker+Time [2022-03-18 19:19:21,276 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 509 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 681 Invalid, 13 Unknown, 0 Unchecked, 35.4s Time] [2022-03-18 19:19:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-18 19:19:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 235. [2022-03-18 19:19:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 132 states have internal predecessors, (147), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-18 19:19:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 307 transitions. [2022-03-18 19:19:21,285 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 307 transitions. Word has length 132 [2022-03-18 19:19:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:19:21,285 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 307 transitions. [2022-03-18 19:19:21,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-03-18 19:19:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 307 transitions. [2022-03-18 19:19:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 19:19:21,286 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:19:21,287 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:19:21,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 19:19:21,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:19:21,487 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:19:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:19:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 2 times [2022-03-18 19:19:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:19:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60749885] [2022-03-18 19:19:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:19:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:19:21,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:19:21,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119685825] [2022-03-18 19:19:21,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:19:21,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:19:21,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:19:21,497 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:19:21,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 19:19:21,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:19:21,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:19:21,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 19:19:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:19:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 19:19:23,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:19:24,102 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 19:19:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 19:19:36,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:19:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60749885] [2022-03-18 19:19:36,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:19:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119685825] [2022-03-18 19:19:36,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119685825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:19:36,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:19:36,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-18 19:19:36,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763091608] [2022-03-18 19:19:36,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:19:36,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 19:19:36,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:19:36,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 19:19:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=675, Unknown=2, NotChecked=0, Total=812 [2022-03-18 19:19:36,868 INFO L87 Difference]: Start difference. First operand 235 states and 307 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-18 19:19:45,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:50,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:52,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:19:57,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:20:02,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:20:04,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:20:06,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:20:39,367 WARN L232 SmtUtils]: Spent 32.07s on a formula simplification. DAG size of input: 116 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:20:50,780 WARN L232 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 85 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:20:52,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:21:02,132 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:21:05,638 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* (- 1) c_main_~b~0) c_main_~c~0)) (.cse3 (* c_main_~b~0 2)) (.cse6 (<= c_main_~b~0 0)) (.cse5 (div c_main_~a~0 c_main_~b~0)) (.cse4 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse8 (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0)))) (and (let ((.cse1 (+ c_main_~b~0 (* (- 1) c_main_~c~0) c_main_~a~0))) (let ((.cse2 (div .cse1 c_main_~b~0))) (or (not (= .cse0 0)) (not (= (mod .cse1 c_main_~b~0) 0)) (not (<= (+ c_main_~k~0 1) .cse2)) (= 0 (+ (* (+ c_main_~p~0 (* (- 1) .cse2 c_main_~q~0)) c_main_~x~0) (* (+ c_main_~r~0 (* (- 1) .cse2 c_main_~s~0)) c_main_~y~0))) (<= .cse3 c_main_~c~0)))) (or (= (+ (* .cse4 c_main_~x~0) (* (+ (* (- 1) c_main_~s~0 c_main_~k~0) c_main_~r~0) c_main_~y~0)) 0) (not (= c_main_~c~0 0)) (<= c_main_~b~0 c_main_~c~0)) (or (< .cse5 (+ 2 c_main_~k~0)) (= (+ (* (+ c_main_~r~0 (* (- 1) .cse5 c_main_~s~0)) c_main_~y~0) (* c_main_~x~0 (+ (* (- 1) .cse5 c_main_~q~0) c_main_~p~0))) 0) (not (= c_main_~b~0 .cse0)) .cse6 (not (= (mod c_main_~a~0 c_main_~b~0) 0))) (or (not (= .cse3 c_main_~a~0)) .cse6 (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) (+ (* .cse5 c_main_~s~0 c_main_~y~0) (* .cse5 c_main_~q~0 c_main_~x~0)))) (or (<= c_main_~c~0 0) (= (let ((.cse7 (div c_main_~b~0 c_main_~c~0))) (+ (* .cse7 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))) c_main_~y~0) (* .cse7 .cse4 c_main_~x~0))) .cse8) (not (= c_main_~b~0 (* 2 c_main_~c~0)))) (= .cse8 0))) is different from true [2022-03-18 19:21:08,146 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* (- 1) c_main_~b~0) c_main_~c~0)) (.cse4 (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0)))) (and (let ((.cse1 (+ c_main_~b~0 (* (- 1) c_main_~c~0) c_main_~a~0))) (let ((.cse2 (div .cse1 c_main_~b~0))) (or (not (= .cse0 0)) (not (= (mod .cse1 c_main_~b~0) 0)) (not (<= (+ c_main_~k~0 1) .cse2)) (= 0 (+ (* (+ c_main_~p~0 (* (- 1) .cse2 c_main_~q~0)) c_main_~x~0) (* (+ c_main_~r~0 (* (- 1) .cse2 c_main_~s~0)) c_main_~y~0))) (<= (* c_main_~b~0 2) c_main_~c~0)))) (let ((.cse3 (div c_main_~a~0 c_main_~b~0))) (or (< .cse3 (+ 2 c_main_~k~0)) (= (+ (* (+ c_main_~r~0 (* (- 1) .cse3 c_main_~s~0)) c_main_~y~0) (* c_main_~x~0 (+ (* (- 1) .cse3 c_main_~q~0) c_main_~p~0))) 0) (not (= c_main_~b~0 .cse0)) (<= c_main_~b~0 0) (not (= (mod c_main_~a~0 c_main_~b~0) 0)))) (or (<= c_main_~a~0 0) (= .cse4 (let ((.cse5 (div c_main_~b~0 c_main_~a~0))) (+ (* c_main_~r~0 c_main_~y~0 .cse5) (* c_main_~p~0 c_main_~x~0 .cse5)))) (not (= c_main_~b~0 .cse4)) (not (= c_main_~b~0 (* 2 c_main_~a~0)))) (or (= (+ (* (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0)) c_main_~x~0) (* (+ (* (- 1) c_main_~s~0 c_main_~k~0) c_main_~r~0) c_main_~y~0)) 0) (not (= c_main_~c~0 0))) (or (= .cse4 0) (not (= c_main_~b~0 0))))) is different from true [2022-03-18 19:21:10,441 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* (- 1) c_main_~b~0) c_main_~c~0)) (.cse3 (* c_main_~b~0 2)) (.cse6 (<= c_main_~b~0 0)) (.cse5 (div c_main_~a~0 c_main_~b~0)) (.cse4 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse8 (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0)))) (and (let ((.cse1 (+ c_main_~b~0 (* (- 1) c_main_~c~0) c_main_~a~0))) (let ((.cse2 (div .cse1 c_main_~b~0))) (or (not (= .cse0 0)) (not (= (mod .cse1 c_main_~b~0) 0)) (not (<= (+ c_main_~k~0 1) .cse2)) (= 0 (+ (* (+ c_main_~p~0 (* (- 1) .cse2 c_main_~q~0)) c_main_~x~0) (* (+ c_main_~r~0 (* (- 1) .cse2 c_main_~s~0)) c_main_~y~0))) (<= .cse3 c_main_~c~0)))) (or (= (+ (* .cse4 c_main_~x~0) (* (+ (* (- 1) c_main_~s~0 c_main_~k~0) c_main_~r~0) c_main_~y~0)) 0) (not (= c_main_~c~0 0)) (<= c_main_~b~0 c_main_~c~0)) (or (< .cse5 (+ 2 c_main_~k~0)) (= (+ (* (+ c_main_~r~0 (* (- 1) .cse5 c_main_~s~0)) c_main_~y~0) (* c_main_~x~0 (+ (* (- 1) .cse5 c_main_~q~0) c_main_~p~0))) 0) (not (= c_main_~b~0 .cse0)) .cse6 (not (= (mod c_main_~a~0 c_main_~b~0) 0))) (or (not (= .cse3 c_main_~a~0)) .cse6 (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) (+ (* .cse5 c_main_~s~0 c_main_~y~0) (* .cse5 c_main_~q~0 c_main_~x~0)))) (or (<= c_main_~c~0 0) (= (let ((.cse7 (div c_main_~b~0 c_main_~c~0))) (+ (* .cse7 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))) c_main_~y~0) (* .cse7 .cse4 c_main_~x~0))) .cse8) (not (= c_main_~b~0 (* 2 c_main_~c~0)))) (or (<= c_main_~a~0 0) (= .cse8 (let ((.cse9 (div c_main_~b~0 c_main_~a~0))) (+ (* c_main_~r~0 c_main_~y~0 .cse9) (* c_main_~p~0 c_main_~x~0 .cse9)))) (not (= c_main_~b~0 .cse8)) (not (= c_main_~b~0 (* 2 c_main_~a~0)))))) is different from true [2022-03-18 19:21:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:21:10,460 INFO L93 Difference]: Finished difference Result 297 states and 402 transitions. [2022-03-18 19:21:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 19:21:10,460 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) Word has length 138 [2022-03-18 19:21:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:21:10,462 INFO L225 Difference]: With dead ends: 297 [2022-03-18 19:21:10,462 INFO L226 Difference]: Without dead ends: 291 [2022-03-18 19:21:10,463 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 78.6s TimeCoverageRelationStatistics Valid=624, Invalid=2459, Unknown=9, NotChecked=330, Total=3422 [2022-03-18 19:21:10,464 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 131 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 263 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2022-03-18 19:21:10,464 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 632 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 873 Invalid, 9 Unknown, 4 Unchecked, 24.7s Time] [2022-03-18 19:21:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-18 19:21:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 250. [2022-03-18 19:21:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 137 states have (on average 1.1240875912408759) internal successors, (154), 139 states have internal predecessors, (154), 89 states have call successors, (89), 24 states have call predecessors, (89), 23 states have return successors, (87), 86 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-18 19:21:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 330 transitions. [2022-03-18 19:21:10,473 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 330 transitions. Word has length 138 [2022-03-18 19:21:10,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:21:10,473 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 330 transitions. [2022-03-18 19:21:10,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-18 19:21:10,473 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 330 transitions. [2022-03-18 19:21:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 19:21:10,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:21:10,475 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:21:10,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 19:21:10,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 19:21:10,699 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:21:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:21:10,699 INFO L85 PathProgramCache]: Analyzing trace with hash -739364489, now seen corresponding path program 4 times [2022-03-18 19:21:10,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:21:10,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873379015] [2022-03-18 19:21:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:21:10,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:21:10,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:21:10,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733253284] [2022-03-18 19:21:10,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 19:21:10,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:21:10,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:21:10,709 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:21:10,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 19:21:10,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 19:21:10,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:21:10,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-18 19:21:10,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:21:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 191 proven. 217 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2022-03-18 19:21:13,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:21:13,606 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 19:21:13,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:21:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873379015] [2022-03-18 19:21:13,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:21:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733253284] [2022-03-18 19:21:13,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733253284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 19:21:13,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:21:13,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-18 19:21:13,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449385617] [2022-03-18 19:21:13,804 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 19:21:13,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 19:21:13,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:21:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 19:21:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-18 19:21:13,805 INFO L87 Difference]: Start difference. First operand 250 states and 330 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2022-03-18 19:21:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:21:16,993 INFO L93 Difference]: Finished difference Result 336 states and 447 transitions. [2022-03-18 19:21:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 19:21:16,993 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) Word has length 176 [2022-03-18 19:21:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:21:16,995 INFO L225 Difference]: With dead ends: 336 [2022-03-18 19:21:16,995 INFO L226 Difference]: Without dead ends: 336 [2022-03-18 19:21:16,995 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-03-18 19:21:16,996 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 39 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 19:21:16,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 746 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 19:21:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-03-18 19:21:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 332. [2022-03-18 19:21:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 180 states have (on average 1.1277777777777778) internal successors, (203), 182 states have internal predecessors, (203), 121 states have call successors, (121), 31 states have call predecessors, (121), 30 states have return successors, (119), 118 states have call predecessors, (119), 119 states have call successors, (119) [2022-03-18 19:21:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 443 transitions. [2022-03-18 19:21:17,006 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 443 transitions. Word has length 176 [2022-03-18 19:21:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:21:17,006 INFO L478 AbstractCegarLoop]: Abstraction has 332 states and 443 transitions. [2022-03-18 19:21:17,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2022-03-18 19:21:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 443 transitions. [2022-03-18 19:21:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 19:21:17,008 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:21:17,009 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:21:17,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 19:21:17,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 19:21:17,233 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:21:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:21:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash 980979816, now seen corresponding path program 3 times [2022-03-18 19:21:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:21:17,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530073183] [2022-03-18 19:21:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:21:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:21:17,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:21:17,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412465363] [2022-03-18 19:21:17,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 19:21:17,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:21:17,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:21:17,258 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:21:17,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 19:21:17,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 19:21:17,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:21:17,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-18 19:21:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:21:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 175 proven. 99 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-03-18 19:21:19,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:21:20,572 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 19:21:37,518 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse9 (* c_main_~b~0 2))) (let ((.cse1 (+ .cse9 (* (- 1) c_main_~c~0))) (.cse2 (+ (* (- 1) c_main_~b~0) c_main_~c~0))) (let ((.cse0 (div .cse1 .cse2)) (.cse7 (* c_main_~p~0 c_main_~x~0)) (.cse8 (* c_main_~r~0 c_main_~y~0)) (.cse3 (* c_main_~q~0 c_main_~x~0)) (.cse5 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse4 (* c_main_~s~0 c_main_~y~0)) (.cse6 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (<= (+ (* c_main_~c~0 .cse0) (* 2 c_main_~c~0)) (+ (* c_main_~b~0 3) (* c_main_~b~0 .cse0))) (not (= (mod .cse1 .cse2) 0)) (= (+ (* .cse3 2) (* c_main_~s~0 .cse0 c_main_~y~0 c_main_~k~0) (* 2 .cse4) .cse5 (* c_main_~q~0 .cse0 c_main_~x~0 c_main_~k~0) (* c_main_~q~0 .cse0 c_main_~x~0) (* c_main_~s~0 .cse0 c_main_~y~0) .cse6) (+ .cse7 .cse8 (* c_main_~r~0 .cse0 c_main_~y~0) (* c_main_~p~0 .cse0 c_main_~x~0))) (<= .cse9 c_main_~c~0) (not (= (+ c_main_~b~0 .cse7 .cse8) (+ .cse3 .cse5 c_main_~c~0 .cse4 .cse6))))))) is different from true [2022-03-18 19:22:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 169 proven. 60 refuted. 0 times theorem prover too weak. 1050 trivial. 30 not checked. [2022-03-18 19:22:17,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:17,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530073183] [2022-03-18 19:22:17,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:17,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412465363] [2022-03-18 19:22:17,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412465363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:22:17,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:22:17,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2022-03-18 19:22:17,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477868119] [2022-03-18 19:22:17,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:22:17,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 19:22:17,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 19:22:17,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=723, Unknown=3, NotChecked=56, Total=930 [2022-03-18 19:22:17,945 INFO L87 Difference]: Start difference. First operand 332 states and 443 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 17 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (45), 13 states have call predecessors, (45), 15 states have call successors, (45) [2022-03-18 19:22:30,118 WARN L232 SmtUtils]: Spent 10.00s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:22:41,699 WARN L232 SmtUtils]: Spent 10.68s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:22:43,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:22:48,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:22:50,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:22:57,510 WARN L232 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:22:59,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:23:28,764 WARN L232 SmtUtils]: Spent 28.65s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:23:30,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:23:33,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:23:35,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:23:44,881 WARN L232 SmtUtils]: Spent 8.62s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:23:46,141 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:23:48,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:23:57,876 WARN L232 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:24:09,352 WARN L232 SmtUtils]: Spent 9.33s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:24:11,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:24:37,540 WARN L232 SmtUtils]: Spent 20.48s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:24:46,401 WARN L232 SmtUtils]: Spent 8.78s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:24:48,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:24:50,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:25:03,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:25:05,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:25:09,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:25:11,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:25:30,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:25:32,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:25:34,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:25:36,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:25:37,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:26:27,045 WARN L232 SmtUtils]: Spent 9.08s on a formula simplification. DAG size of input: 116 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:26:29,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:27:03,728 WARN L232 SmtUtils]: Spent 8.82s on a formula simplification. DAG size of input: 147 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:27:06,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:27:10,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:27:12,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:27:15,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:27:17,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:27:21,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:27:23,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:27:26,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:27:44,797 WARN L232 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 120 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:27:48,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:28:10,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:28:13,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:28:33,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:28:36,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:29:18,902 WARN L232 SmtUtils]: Spent 25.01s on a formula simplification. DAG size of input: 115 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:29:20,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:29:37,973 WARN L232 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 98 DAG size of output: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:29:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:29:38,032 INFO L93 Difference]: Finished difference Result 416 states and 560 transitions. [2022-03-18 19:29:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 19:29:38,032 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 17 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (45), 13 states have call predecessors, (45), 15 states have call successors, (45) Word has length 182 [2022-03-18 19:29:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:29:38,036 INFO L225 Difference]: With dead ends: 416 [2022-03-18 19:29:38,036 INFO L226 Difference]: Without dead ends: 410 [2022-03-18 19:29:38,037 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 337 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 359.9s TimeCoverageRelationStatistics Valid=767, Invalid=2983, Unknown=36, NotChecked=120, Total=3906 [2022-03-18 19:29:38,037 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 112 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 329 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 92.9s IncrementalHoareTripleChecker+Time [2022-03-18 19:29:38,037 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 528 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 934 Invalid, 30 Unknown, 106 Unchecked, 92.9s Time] [2022-03-18 19:29:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-18 19:29:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 312. [2022-03-18 19:29:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 176 states have (on average 1.0909090909090908) internal successors, (192), 179 states have internal predecessors, (192), 102 states have call successors, (102), 34 states have call predecessors, (102), 33 states have return successors, (101), 98 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-18 19:29:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 395 transitions. [2022-03-18 19:29:38,054 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 395 transitions. Word has length 182 [2022-03-18 19:29:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:29:38,054 INFO L478 AbstractCegarLoop]: Abstraction has 312 states and 395 transitions. [2022-03-18 19:29:38,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 17 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (45), 13 states have call predecessors, (45), 15 states have call successors, (45) [2022-03-18 19:29:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 395 transitions. [2022-03-18 19:29:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-18 19:29:38,056 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:29:38,056 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:29:38,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 19:29:38,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 19:29:38,281 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:29:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:29:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash 107823089, now seen corresponding path program 5 times [2022-03-18 19:29:38,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:29:38,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079704745] [2022-03-18 19:29:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:29:38,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:29:38,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:29:38,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771976312] [2022-03-18 19:29:38,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 19:29:38,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:29:38,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:29:38,293 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:29:38,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 19:29:38,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-18 19:29:38,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:29:38,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-18 19:29:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:29:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 131 proven. 152 refuted. 0 times theorem prover too weak. 1362 trivial. 0 not checked. [2022-03-18 19:29:41,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:29:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 131 proven. 128 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2022-03-18 19:29:51,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:29:51,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079704745] [2022-03-18 19:29:51,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:29:51,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771976312] [2022-03-18 19:29:51,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771976312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:29:51,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:29:51,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-03-18 19:29:51,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95550644] [2022-03-18 19:29:51,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:29:51,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 19:29:51,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:29:51,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 19:29:51,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=944, Unknown=1, NotChecked=0, Total=1190 [2022-03-18 19:29:51,425 INFO L87 Difference]: Start difference. First operand 312 states and 395 transitions. Second operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 20 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (67), 20 states have call predecessors, (67), 19 states have call successors, (67) [2022-03-18 19:30:38,350 WARN L232 SmtUtils]: Spent 43.03s on a formula simplification that was a NOOP. DAG size: 249 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:30:40,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:30:48,435 WARN L232 SmtUtils]: Spent 5.48s on a formula simplification that was a NOOP. DAG size: 153 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:30:52,373 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 []