/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:58:58,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:58:58,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:58:58,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 13:58:58,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 13:58:58,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 13:58:58,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 13:58:58,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 13:58:58,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 13:58:58,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 13:58:58,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 13:58:58,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 13:58:58,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:58:58,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:58:58,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:58:58,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:58:58,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:58:58,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:58:58,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:58:58,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:58:58,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:58:58,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:58:58,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:58:58,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:58:58,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 13:58:58,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 13:58:58,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 13:58:58,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 13:58:58,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 13:58:58,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 13:58:58,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 13:58:58,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 13:58:58,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 13:58:58,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 13:58:58,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 13:58:58,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 13:58:58,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 13:58:58,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 13:58:58,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:58:58,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:58:58,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:58:58,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:58:58,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:58:58,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:58:58,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:58:58,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:58:58,882 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:58:58,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:58:58,882 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:58:58,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:58:58,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:58:58,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:58:58,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:58:58,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:58:58,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:58:58,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:58:58,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:58:58,884 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:58:58,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:58:58,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:58:58,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:58:58,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:58:58,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:58:58,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:58:58,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:58:58,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:58:58,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:58:58,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:58:58,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:58:58,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:58:58,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:58:59,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:58:59,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:58:59,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:58:59,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:58:59,232 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:58:59,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound100.c [2021-05-02 13:58:59,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7446b5324/f822927dea5e4ae1bb70d3bf251a0f31/FLAG324a572ed [2021-05-02 13:58:59,789 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:58:59,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound100.c [2021-05-02 13:58:59,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7446b5324/f822927dea5e4ae1bb70d3bf251a0f31/FLAG324a572ed [2021-05-02 13:59:00,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7446b5324/f822927dea5e4ae1bb70d3bf251a0f31 [2021-05-02 13:59:00,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:59:00,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:59:00,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:59:00,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:59:00,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:59:00,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:59:00" (1/1) ... [2021-05-02 13:59:00,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ef0404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00, skipping insertion in model container [2021-05-02 13:59:00,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:59:00" (1/1) ... [2021-05-02 13:59:00,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:59:00,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:59:00,318 WARN L224 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/cohencu-ll_valuebound100.c[596,609] [2021-05-02 13:59:00,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:59:00,343 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:59:00,389 WARN L224 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/cohencu-ll_valuebound100.c[596,609] [2021-05-02 13:59:00,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:59:00,423 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:59:00,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00 WrapperNode [2021-05-02 13:59:00,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:59:00,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:59:00,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:59:00,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:59:00,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00" (1/1) ... [2021-05-02 13:59:00,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00" (1/1) ... [2021-05-02 13:59:00,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00" (1/1) ... [2021-05-02 13:59:00,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00" (1/1) ... [2021-05-02 13:59:00,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00" (1/1) ... [2021-05-02 13:59:00,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00" (1/1) ... [2021-05-02 13:59:00,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00" (1/1) ... [2021-05-02 13:59:00,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:59:00,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:59:00,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:59:00,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:59:00,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:59:00,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:59:00,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:59:00,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:59:00,551 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:59:00,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:59:00,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:59:00,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:59:00,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:59:00,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:59:00,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:59:00,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 13:59:00,553 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:59:00,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:59:00,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:59:00,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:59:00,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:59:00,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:59:00,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:59:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:59:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:59:00,870 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:59:00,870 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:59:00,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:59:00 BoogieIcfgContainer [2021-05-02 13:59:00,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:59:00,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:59:00,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:59:00,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:59:00,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:59:00" (1/3) ... [2021-05-02 13:59:00,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fca662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:59:00, skipping insertion in model container [2021-05-02 13:59:00,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:59:00" (2/3) ... [2021-05-02 13:59:00,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fca662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:59:00, skipping insertion in model container [2021-05-02 13:59:00,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:59:00" (3/3) ... [2021-05-02 13:59:00,894 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound100.c [2021-05-02 13:59:00,901 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:59:00,904 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:59:00,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:59:00,936 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:59:00,936 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:59:00,936 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:59:00,936 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:59:00,936 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:59:00,936 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:59:00,937 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:59:00,937 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:59:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2021-05-02 13:59:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:59:00,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:00,956 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:00,956 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:00,961 INFO L82 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2021-05-02 13:59:00,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:00,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924495452] [2021-05-02 13:59:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:59:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:01,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:59:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:59:01,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:01,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924495452] [2021-05-02 13:59:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924495452] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:59:01,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:59:01,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:59:01,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306032924] [2021-05-02 13:59:01,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:59:01,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:01,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:59:01,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:59:01,177 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:59:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:01,336 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2021-05-02 13:59:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:59:01,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:59:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:01,344 INFO L225 Difference]: With dead ends: 63 [2021-05-02 13:59:01,344 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 13:59:01,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:59:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 13:59:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 13:59:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-05-02 13:59:01,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-05-02 13:59:01,407 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2021-05-02 13:59:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:01,408 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-05-02 13:59:01,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:59:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-05-02 13:59:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:59:01,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:01,409 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:01,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:59:01,411 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2021-05-02 13:59:01,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:01,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002600813] [2021-05-02 13:59:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:01,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:59:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:59:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:59:01,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:01,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002600813] [2021-05-02 13:59:01,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002600813] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:59:01,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:59:01,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:59:01,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162781387] [2021-05-02 13:59:01,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:59:01,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:01,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:59:01,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:59:01,572 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:59:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:01,947 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-02 13:59:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:59:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:59:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:01,949 INFO L225 Difference]: With dead ends: 37 [2021-05-02 13:59:01,949 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:59:01,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:59:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 13:59:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 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) [2021-05-02 13:59:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 13:59:01,960 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2021-05-02 13:59:01,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:01,961 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 13:59:01,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:59:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 13:59:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:59:01,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:01,962 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:01,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:59:01,962 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2021-05-02 13:59:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:01,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997242260] [2021-05-02 13:59:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:01,976 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:01,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045565481] [2021-05-02 13:59:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:59:02,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:59:02,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:02,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997242260] [2021-05-02 13:59:02,177 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:02,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045565481] [2021-05-02 13:59:02,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045565481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:02,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:02,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:59:02,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897742330] [2021-05-02 13:59:02,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:59:02,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:02,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:59:02,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:59:02,179 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:59:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:02,412 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-05-02 13:59:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:59:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:59:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:02,416 INFO L225 Difference]: With dead ends: 58 [2021-05-02 13:59:02,417 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:59:02,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:59:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 13:59:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 13:59:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 13:59:02,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 13:59:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:02,439 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 13:59:02,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:59:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 13:59:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:59:02,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:02,440 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:02,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 13:59:02,641 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:02,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2021-05-02 13:59:02,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:02,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786284746] [2021-05-02 13:59:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:02,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:02,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195316611] [2021-05-02 13:59:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:59:02,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:59:02,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:02,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786284746] [2021-05-02 13:59:02,775 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:02,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195316611] [2021-05-02 13:59:02,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195316611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:02,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:02,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:59:02,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295153109] [2021-05-02 13:59:02,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:59:02,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:02,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:59:02,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:59:02,777 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:59:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:03,015 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2021-05-02 13:59:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:59:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 13:59:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:03,017 INFO L225 Difference]: With dead ends: 62 [2021-05-02 13:59:03,017 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 13:59:03,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 13:59:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 13:59:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 13:59:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2021-05-02 13:59:03,036 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 27 [2021-05-02 13:59:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:03,037 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2021-05-02 13:59:03,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:59:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2021-05-02 13:59:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:59:03,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:03,038 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 13:59:03,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:03,258 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2021-05-02 13:59:03,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:03,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597376774] [2021-05-02 13:59:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:03,269 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:03,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069262125] [2021-05-02 13:59:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:03,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:59:03,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:59:03,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:03,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597376774] [2021-05-02 13:59:03,453 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:03,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069262125] [2021-05-02 13:59:03,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069262125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:03,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:03,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:59:03,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024384450] [2021-05-02 13:59:03,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:59:03,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:03,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:59:03,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:59:03,455 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:59:03,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:03,639 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2021-05-02 13:59:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:59:03,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-05-02 13:59:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:03,641 INFO L225 Difference]: With dead ends: 66 [2021-05-02 13:59:03,642 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 13:59:03,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:03,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 13:59:03,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 13:59:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 13:59:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-05-02 13:59:03,652 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 32 [2021-05-02 13:59:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:03,652 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-05-02 13:59:03,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:59:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-05-02 13:59:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 13:59:03,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:03,654 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-02 13:59:03,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:03,873 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:03,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2021-05-02 13:59:03,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:03,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494434452] [2021-05-02 13:59:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:03,889 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:03,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784294686] [2021-05-02 13:59:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:03,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:59:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 13:59:04,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:04,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494434452] [2021-05-02 13:59:04,067 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:04,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784294686] [2021-05-02 13:59:04,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784294686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:04,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:04,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:59:04,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460507374] [2021-05-02 13:59:04,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:59:04,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:59:04,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:59:04,069 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:59:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:04,289 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-05-02 13:59:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:59:04,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-02 13:59:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:04,294 INFO L225 Difference]: With dead ends: 81 [2021-05-02 13:59:04,294 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 13:59:04,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:59:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 13:59:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-02 13:59:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 13:59:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-05-02 13:59:04,323 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 49 [2021-05-02 13:59:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:04,324 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-05-02 13:59:04,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:59:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-05-02 13:59:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 13:59:04,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:04,327 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-02 13:59:04,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:04,541 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 2 times [2021-05-02 13:59:04,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:04,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681329683] [2021-05-02 13:59:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:04,551 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:04,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053637590] [2021-05-02 13:59:04,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:04,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:59:04,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:59:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:59:04,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 13:59:04,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:04,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681329683] [2021-05-02 13:59:04,747 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:04,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053637590] [2021-05-02 13:59:04,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053637590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:04,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:04,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:59:04,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679200996] [2021-05-02 13:59:04,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:59:04,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:04,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:59:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:59:04,749 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 13:59:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:04,971 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-05-02 13:59:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:59:04,972 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 54 [2021-05-02 13:59:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:04,973 INFO L225 Difference]: With dead ends: 85 [2021-05-02 13:59:04,973 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 13:59:04,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:59:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 13:59:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 13:59:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 43 states have internal predecessors, (44), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 13:59:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-05-02 13:59:04,984 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 54 [2021-05-02 13:59:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:04,984 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-05-02 13:59:04,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 13:59:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-05-02 13:59:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 13:59:04,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:04,986 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:05,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 13:59:05,202 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash -310331719, now seen corresponding path program 1 times [2021-05-02 13:59:05,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:05,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789846425] [2021-05-02 13:59:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:05,211 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:05,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648474056] [2021-05-02 13:59:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:59:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:05,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-02 13:59:05,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:05,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789846425] [2021-05-02 13:59:05,609 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:05,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648474056] [2021-05-02 13:59:05,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648474056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:05,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:05,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:59:05,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914975414] [2021-05-02 13:59:05,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:59:05,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:05,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:59:05,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:05,611 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:59:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:05,780 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-05-02 13:59:05,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:59:05,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2021-05-02 13:59:05,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:05,782 INFO L225 Difference]: With dead ends: 91 [2021-05-02 13:59:05,782 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 13:59:05,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:59:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 13:59:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 13:59:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 13:59:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-05-02 13:59:05,793 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 75 [2021-05-02 13:59:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:05,793 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-05-02 13:59:05,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:59:05,794 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-05-02 13:59:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 13:59:05,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:05,795 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:06,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:06,018 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash -63758730, now seen corresponding path program 3 times [2021-05-02 13:59:06,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:06,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696694123] [2021-05-02 13:59:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:06,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:06,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68339697] [2021-05-02 13:59:06,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:06,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:59:06,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:59:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:59:06,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:06,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 13:59:06,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:06,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696694123] [2021-05-02 13:59:06,302 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:06,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68339697] [2021-05-02 13:59:06,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68339697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:06,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:06,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:59:06,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309761495] [2021-05-02 13:59:06,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:59:06,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:06,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:59:06,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:06,303 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:59:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:06,599 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-05-02 13:59:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:59:06,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2021-05-02 13:59:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:06,601 INFO L225 Difference]: With dead ends: 112 [2021-05-02 13:59:06,601 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 13:59:06,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:59:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 13:59:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 13:59:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 38 states have call successors, (38), 16 states have call predecessors, (38), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 13:59:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-05-02 13:59:06,613 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 76 [2021-05-02 13:59:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:06,614 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-05-02 13:59:06,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:59:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-05-02 13:59:06,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 13:59:06,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:06,615 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:06,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 13:59:06,838 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1701746168, now seen corresponding path program 1 times [2021-05-02 13:59:06,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:06,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199665858] [2021-05-02 13:59:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:06,847 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:06,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103447104] [2021-05-02 13:59:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:59:06,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:06,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:06,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 13:59:07,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:07,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199665858] [2021-05-02 13:59:07,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:07,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103447104] [2021-05-02 13:59:07,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103447104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:07,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:07,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:59:07,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411113507] [2021-05-02 13:59:07,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:59:07,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:07,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:59:07,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:07,180 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 13:59:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:07,356 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2021-05-02 13:59:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:59:07,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2021-05-02 13:59:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:07,359 INFO L225 Difference]: With dead ends: 115 [2021-05-02 13:59:07,359 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 13:59:07,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:59:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 13:59:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 13:59:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 61 states have internal predecessors, (62), 38 states have call successors, (38), 17 states have call predecessors, (38), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 13:59:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-05-02 13:59:07,373 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 80 [2021-05-02 13:59:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:07,373 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-05-02 13:59:07,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 13:59:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-05-02 13:59:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 13:59:07,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:07,375 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:07,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 13:59:07,589 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1156119141, now seen corresponding path program 4 times [2021-05-02 13:59:07,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:07,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182313891] [2021-05-02 13:59:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:07,598 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:07,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799351071] [2021-05-02 13:59:07,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:07,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:59:07,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:59:07,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 13:59:07,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-02 13:59:07,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:07,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182313891] [2021-05-02 13:59:07,834 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:07,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799351071] [2021-05-02 13:59:07,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799351071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:07,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:07,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:59:07,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257572995] [2021-05-02 13:59:07,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:59:07,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:07,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:59:07,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:07,837 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 13:59:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:08,162 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-05-02 13:59:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:59:08,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 81 [2021-05-02 13:59:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:08,165 INFO L225 Difference]: With dead ends: 124 [2021-05-02 13:59:08,165 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 13:59:08,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:59:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 13:59:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 13:59:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 60 states have internal predecessors, (61), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 13:59:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-05-02 13:59:08,186 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 81 [2021-05-02 13:59:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:08,187 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-05-02 13:59:08,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 13:59:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-05-02 13:59:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 13:59:08,188 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:08,189 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:08,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:08,407 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1087104342, now seen corresponding path program 5 times [2021-05-02 13:59:08,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:08,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623710388] [2021-05-02 13:59:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:08,417 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:08,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191103670] [2021-05-02 13:59:08,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:08,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 13:59:08,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:59:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 13:59:08,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 83 proven. 50 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-02 13:59:08,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:08,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623710388] [2021-05-02 13:59:08,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:08,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191103670] [2021-05-02 13:59:08,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191103670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:08,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:08,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:59:08,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076592848] [2021-05-02 13:59:08,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:59:08,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:59:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:08,658 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 13:59:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:08,915 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2021-05-02 13:59:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:59:08,916 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 86 [2021-05-02 13:59:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:08,917 INFO L225 Difference]: With dead ends: 116 [2021-05-02 13:59:08,917 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 13:59:08,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:59:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 13:59:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 13:59:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 13:59:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-05-02 13:59:08,926 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 86 [2021-05-02 13:59:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:08,927 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-05-02 13:59:08,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 13:59:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-05-02 13:59:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 13:59:08,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:08,928 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:09,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:09,145 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash 511374036, now seen corresponding path program 2 times [2021-05-02 13:59:09,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:09,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909541598] [2021-05-02 13:59:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:09,152 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:09,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243784509] [2021-05-02 13:59:09,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:09,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:59:09,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:59:09,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:59:09,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:09,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 46 proven. 52 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-02 13:59:09,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:09,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909541598] [2021-05-02 13:59:09,581 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:09,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243784509] [2021-05-02 13:59:09,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243784509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:09,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:09,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:59:09,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15548376] [2021-05-02 13:59:09,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:59:09,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:59:09,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:09,583 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-02 13:59:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:09,861 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2021-05-02 13:59:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:59:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2021-05-02 13:59:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:09,862 INFO L225 Difference]: With dead ends: 117 [2021-05-02 13:59:09,862 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 13:59:09,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:59:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 13:59:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-02 13:59:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 13:59:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-05-02 13:59:09,876 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 102 [2021-05-02 13:59:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:09,876 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-05-02 13:59:09,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-02 13:59:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-05-02 13:59:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 13:59:09,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:09,877 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:10,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:59:10,093 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash -360684101, now seen corresponding path program 6 times [2021-05-02 13:59:10,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:10,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127683660] [2021-05-02 13:59:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:10,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:10,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390980009] [2021-05-02 13:59:10,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:10,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 13:59:10,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:59:10,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:59:10,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:10,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-05-02 13:59:10,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127683660] [2021-05-02 13:59:10,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390980009] [2021-05-02 13:59:10,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390980009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:10,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:10,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:59:10,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029086343] [2021-05-02 13:59:10,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:59:10,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:10,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:59:10,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:59:10,514 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 13:59:12,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:12,860 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2021-05-02 13:59:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:59:12,861 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-05-02 13:59:12,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:12,862 INFO L225 Difference]: With dead ends: 121 [2021-05-02 13:59:12,862 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 13:59:12,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:59:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 13:59:12,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 13:59:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 13:59:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-02 13:59:12,876 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 103 [2021-05-02 13:59:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:12,876 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-02 13:59:12,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 13:59:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-02 13:59:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 13:59:12,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:12,878 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:13,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:13,101 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:13,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1368175293, now seen corresponding path program 2 times [2021-05-02 13:59:13,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:13,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904537266] [2021-05-02 13:59:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:13,108 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:13,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070864283] [2021-05-02 13:59:13,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:13,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:59:13,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:59:13,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:59:13,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:13,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 48 proven. 55 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 13:59:13,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:13,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904537266] [2021-05-02 13:59:13,407 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:13,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070864283] [2021-05-02 13:59:13,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070864283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:13,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:13,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:59:13,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280419285] [2021-05-02 13:59:13,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:59:13,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:13,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:59:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:13,408 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 13:59:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:13,775 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-05-02 13:59:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:59:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2021-05-02 13:59:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:13,776 INFO L225 Difference]: With dead ends: 125 [2021-05-02 13:59:13,776 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 13:59:13,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:59:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 13:59:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 13:59:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 29 states have call successors, (29), 19 states have call predecessors, (29), 18 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 13:59:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2021-05-02 13:59:13,790 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 107 [2021-05-02 13:59:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:13,791 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2021-05-02 13:59:13,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 13:59:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2021-05-02 13:59:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 13:59:13,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:13,792 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:14,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-05-02 13:59:14,015 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:14,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1388085622, now seen corresponding path program 7 times [2021-05-02 13:59:14,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:14,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521146128] [2021-05-02 13:59:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:14,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:14,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960994370] [2021-05-02 13:59:14,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:59:14,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:59:14,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 48 proven. 67 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 13:59:14,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:14,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521146128] [2021-05-02 13:59:14,276 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:14,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960994370] [2021-05-02 13:59:14,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960994370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:14,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:14,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:59:14,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086910024] [2021-05-02 13:59:14,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:59:14,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:14,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:59:14,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:14,277 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 13:59:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:14,620 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2021-05-02 13:59:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:59:14,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2021-05-02 13:59:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:14,623 INFO L225 Difference]: With dead ends: 131 [2021-05-02 13:59:14,623 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 13:59:14,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:59:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 13:59:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2021-05-02 13:59:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 70 states have internal predecessors, (70), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 13:59:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-05-02 13:59:14,639 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 108 [2021-05-02 13:59:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:14,639 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-05-02 13:59:14,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 13:59:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-05-02 13:59:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 13:59:14,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:14,641 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:14,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:14,857 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash 34642523, now seen corresponding path program 8 times [2021-05-02 13:59:14,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:14,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954129932] [2021-05-02 13:59:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:14,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:14,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003675545] [2021-05-02 13:59:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:14,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:59:14,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:59:14,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:59:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 50 proven. 73 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-02 13:59:15,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:59:15,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954129932] [2021-05-02 13:59:15,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:59:15,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003675545] [2021-05-02 13:59:15,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003675545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:59:15,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:59:15,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:59:15,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15148976] [2021-05-02 13:59:15,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:59:15,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:59:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:59:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:59:15,145 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-02 13:59:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:59:15,478 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2021-05-02 13:59:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:59:15,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 113 [2021-05-02 13:59:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:59:15,479 INFO L225 Difference]: With dead ends: 139 [2021-05-02 13:59:15,479 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 13:59:15,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:59:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 13:59:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-05-02 13:59:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.04) internal successors, (78), 77 states have internal predecessors, (78), 37 states have call successors, (37), 22 states have call predecessors, (37), 21 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 13:59:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2021-05-02 13:59:15,495 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 113 [2021-05-02 13:59:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:59:15,497 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2021-05-02 13:59:15,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-02 13:59:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2021-05-02 13:59:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 13:59:15,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:59:15,498 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:59:15,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 13:59:15,717 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:59:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:59:15,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2063139367, now seen corresponding path program 3 times [2021-05-02 13:59:15,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:59:15,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529841448] [2021-05-02 13:59:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:59:15,723 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:59:15,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683225086] [2021-05-02 13:59:15,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:59:24,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:59:24,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:59:24,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:59:24,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:59:24,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:24,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,178 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 13:59:31,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:31,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:33,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:35,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:48,362 WARN L205 SmtUtils]: Spent 10.19 s on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:59:48,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:48,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:50,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:59:52,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:04,025 WARN L205 SmtUtils]: Spent 10.14 s on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 14:00:04,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:04,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:06,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:08,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:00:10,111 WARN L838 $PredicateComparison]: unable to prove that (exists ((aux_div_v_main_~z~0_BEFORE_CALL_145_55 Int) (v_prenex_1 Int) (v_main_~a~0_BEFORE_CALL_64 Int) (aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50 Int)) (let ((.cse0 (* 6 aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50))) (and (<= (+ aux_div_v_main_~z~0_BEFORE_CALL_145_55 aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50) (+ v_main_~a~0_BEFORE_CALL_64 1)) (<= .cse0 0) (= (mod (let ((.cse1 (+ (* aux_div_v_main_~z~0_BEFORE_CALL_145_55 6) (* aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50 6)))) (* (- 1) .cse1 .cse1)) (- 12)) 0) (not (= (+ (* 6 (* aux_div_v_main_~z~0_BEFORE_CALL_145_55 v_prenex_1)) (* 6 (* v_prenex_1 aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50))) (+ (* 6 v_prenex_1) (* 6 (* v_prenex_1 v_main_~a~0_BEFORE_CALL_64))))) (<= v_main_~a~0_BEFORE_CALL_64 100) (<= 0 v_main_~a~0_BEFORE_CALL_64) (< 0 (+ .cse0 6)) (< v_main_~a~0_BEFORE_CALL_64 aux_div_v_main_~z~0_BEFORE_CALL_145_55)))) is different from false [2021-05-02 14:00:12,119 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_v_main_~z~0_BEFORE_CALL_145_55 Int) (v_prenex_1 Int) (v_main_~a~0_BEFORE_CALL_64 Int) (aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50 Int)) (let ((.cse0 (* 6 aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50))) (and (<= (+ aux_div_v_main_~z~0_BEFORE_CALL_145_55 aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50) (+ v_main_~a~0_BEFORE_CALL_64 1)) (<= .cse0 0) (= (mod (let ((.cse1 (+ (* aux_div_v_main_~z~0_BEFORE_CALL_145_55 6) (* aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50 6)))) (* (- 1) .cse1 .cse1)) (- 12)) 0) (not (= (+ (* 6 (* aux_div_v_main_~z~0_BEFORE_CALL_145_55 v_prenex_1)) (* 6 (* v_prenex_1 aux_div_aux_mod_v_main_~z~0_BEFORE_CALL_145_55_50))) (+ (* 6 v_prenex_1) (* 6 (* v_prenex_1 v_main_~a~0_BEFORE_CALL_64))))) (<= v_main_~a~0_BEFORE_CALL_64 100) (<= 0 v_main_~a~0_BEFORE_CALL_64) (< 0 (+ .cse0 6)) (< v_main_~a~0_BEFORE_CALL_64 aux_div_v_main_~z~0_BEFORE_CALL_145_55)))) is different from true [2021-05-02 14:00:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 162 proven. 17 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2021-05-02 14:00:12,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:00:12,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529841448] [2021-05-02 14:00:12,120 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:00:12,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683225086] [2021-05-02 14:00:12,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683225086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:00:12,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:00:12,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:00:12,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541184070] [2021-05-02 14:00:12,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:00:12,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:00:12,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:00:12,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=143, Unknown=3, NotChecked=24, Total=210 [2021-05-02 14:00:12,121 INFO L87 Difference]: Start difference. First operand 134 states and 149 transitions. Second operand has 15 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:00:41,386 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 14:01:18,473 WARN L205 SmtUtils]: Spent 25.36 s on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-05-02 14:01:26,550 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 52 DAG size of output: 6 [2021-05-02 14:01:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:01:36,666 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2021-05-02 14:01:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:01:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 129 [2021-05-02 14:01:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:01:36,670 INFO L225 Difference]: With dead ends: 140 [2021-05-02 14:01:36,671 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 14:01:36,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 78980.9ms TimeCoverageRelationStatistics Valid=69, Invalid=270, Unknown=7, NotChecked=34, Total=380 [2021-05-02 14:01:36,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 14:01:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 14:01:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 80 states have internal predecessors, (81), 37 states have call successors, (37), 23 states have call predecessors, (37), 22 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 14:01:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2021-05-02 14:01:36,682 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 129 [2021-05-02 14:01:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:01:36,682 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2021-05-02 14:01:36,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:01:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2021-05-02 14:01:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 14:01:36,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:01:36,683 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:01:36,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:01:36,884 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:01:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:01:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash -262683944, now seen corresponding path program 3 times [2021-05-02 14:01:36,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:01:36,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787335644] [2021-05-02 14:01:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:01:36,889 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:01:36,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502412793] [2021-05-02 14:01:36,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:01:41,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:01:41,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:01:41,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 14:01:41,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:01:41,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:41,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:42,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:48,123 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 14:01:48,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:01:48,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:02,993 WARN L205 SmtUtils]: Spent 10.17 s on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 14:02:04,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:04,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:05,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:07,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:08,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:10,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:12,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:16,804 WARN L205 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 5125 DAG size of output: 5124 [2021-05-02 14:02:17,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:02:18,979 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 3726 DAG size of output: 3366