/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:30:53,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:30:53,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:30:54,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:30:54,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:30:54,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:30:54,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:30:54,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:30:54,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:30:54,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:30:54,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:30:54,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:30:54,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:30:54,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:30:54,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:30:54,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:30:54,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:30:54,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:30:54,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:30:54,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:30:54,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:30:54,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:30:54,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:30:54,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:30:54,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:30:54,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:30:54,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:30:54,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:30:54,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:30:54,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:30:54,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:30:54,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:30:54,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:30:54,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:30:54,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:30:54,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:30:54,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:30:54,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:30:54,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:30:54,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:30:54,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:30:54,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:30:54,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:30:54,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:30:54,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:30:54,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:30:54,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:30:54,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:30:54,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:30:54,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:30:54,097 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:30:54,097 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:30:54,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:30:54,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:30:54,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:30:54,356 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:30:54,356 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:30:54,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2021-05-02 19:30:54,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a205e0d9f/577a4e8ebc13408e9371017089cc950b/FLAG093b7f662 [2021-05-02 19:30:54,773 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:30:54,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2021-05-02 19:30:54,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a205e0d9f/577a4e8ebc13408e9371017089cc950b/FLAG093b7f662 [2021-05-02 19:30:54,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a205e0d9f/577a4e8ebc13408e9371017089cc950b [2021-05-02 19:30:54,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:30:54,795 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:30:54,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:54,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:30:54,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:30:54,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:54" (1/1) ... [2021-05-02 19:30:54,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b634f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54, skipping insertion in model container [2021-05-02 19:30:54,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:54" (1/1) ... [2021-05-02 19:30:54,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:30:54,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:30:54,917 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_unwindbound10.c[596,609] [2021-05-02 19:30:54,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:54,940 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:30:54,958 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_unwindbound10.c[596,609] [2021-05-02 19:30:54,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:54,990 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:30:54,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54 WrapperNode [2021-05-02 19:30:54,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:54,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:30:54,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:30:54,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:30:55,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54" (1/1) ... [2021-05-02 19:30:55,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54" (1/1) ... [2021-05-02 19:30:55,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54" (1/1) ... [2021-05-02 19:30:55,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54" (1/1) ... [2021-05-02 19:30:55,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54" (1/1) ... [2021-05-02 19:30:55,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54" (1/1) ... [2021-05-02 19:30:55,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54" (1/1) ... [2021-05-02 19:30:55,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:30:55,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:30:55,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:30:55,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:30:55,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54" (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 19:30:55,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:30:55,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:30:55,084 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:30:55,084 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:30:55,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:30:55,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:30:55,084 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:30:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:30:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:30:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:30:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 19:30:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:30:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:30:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:30:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:30:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:30:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:30:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:30:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:30:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:30:55,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:30:55,354 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:30:55,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:55 BoogieIcfgContainer [2021-05-02 19:30:55,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:30:55,355 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:30:55,355 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:30:55,356 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:30:55,358 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:55" (1/1) ... [2021-05-02 19:30:55,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:55 BasicIcfg [2021-05-02 19:30:55,381 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:30:55,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:30:55,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:30:55,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:30:55,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:30:54" (1/4) ... [2021-05-02 19:30:55,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e32f8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:55, skipping insertion in model container [2021-05-02 19:30:55,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:54" (2/4) ... [2021-05-02 19:30:55,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e32f8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:55, skipping insertion in model container [2021-05-02 19:30:55,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:55" (3/4) ... [2021-05-02 19:30:55,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e32f8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:30:55, skipping insertion in model container [2021-05-02 19:30:55,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:55" (4/4) ... [2021-05-02 19:30:55,386 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound10.cJordan [2021-05-02 19:30:55,393 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:30:55,397 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:30:55,408 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:30:55,430 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:30:55,430 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:30:55,430 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:30:55,431 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:30:55,431 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:30:55,431 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:30:55,431 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:30:55,431 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:30:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:30:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:30:55,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:55,450 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:55,451 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2021-05-02 19:30:55,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:55,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650086821] [2021-05-02 19:30:55,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:55,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:30:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:55,695 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 19:30:55,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:55,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650086821] [2021-05-02 19:30:55,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650086821] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:30:55,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:30:55,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:30:55,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604270765] [2021-05-02 19:30:55,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:30:55,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:55,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:30:55,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:30:55,713 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:30:55,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:55,907 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-05-02 19:30:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:30:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:30:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:55,918 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:30:55,919 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 19:30:55,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:30:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 19:30:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 19:30:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:30:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2021-05-02 19:30:55,946 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2021-05-02 19:30:55,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:55,947 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2021-05-02 19:30:55,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:30:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2021-05-02 19:30:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:30:55,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:55,947 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:55,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:30:55,948 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:55,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2021-05-02 19:30:55,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:55,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137587404] [2021-05-02 19:30:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:56,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:30:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:56,034 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 19:30:56,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:56,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137587404] [2021-05-02 19:30:56,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137587404] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:30:56,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:30:56,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:30:56,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158568736] [2021-05-02 19:30:56,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:30:56,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:56,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:30:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:30:56,038 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:30:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:56,186 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-05-02 19:30:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:30:56,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:30:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:56,187 INFO L225 Difference]: With dead ends: 28 [2021-05-02 19:30:56,187 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 19:30:56,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:30:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 19:30:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 19:30:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:30:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2021-05-02 19:30:56,192 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2021-05-02 19:30:56,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:56,192 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-05-02 19:30:56,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:30:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2021-05-02 19:30:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:30:56,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:56,193 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:56,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:30:56,193 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2021-05-02 19:30:56,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:56,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509309230] [2021-05-02 19:30:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:56,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:30:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:56,297 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 19:30:56,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:56,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509309230] [2021-05-02 19:30:56,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509309230] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:30:56,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:30:56,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:30:56,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131288949] [2021-05-02 19:30:56,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:30:56,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:56,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:30:56,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:30:56,299 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:30:56,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:56,567 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-02 19:30:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:30:56,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:30:56,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:56,569 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:30:56,570 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 19:30:56,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:30:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 19:30:56,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 19:30:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:30:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 19:30:56,584 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 19:30:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:56,584 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 19:30:56,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:30:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 19:30:56,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:30:56,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:56,585 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:56,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 19:30:56,586 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2021-05-02 19:30:56,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:56,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661959489] [2021-05-02 19:30:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:56,615 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:56,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531109782] [2021-05-02 19:30:56,615 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 19:30:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:56,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:30:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:56,846 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 19:30:56,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:56,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661959489] [2021-05-02 19:30:56,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:56,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531109782] [2021-05-02 19:30:56,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531109782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:56,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:56,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:30:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270302352] [2021-05-02 19:30:56,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:30:56,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:56,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:30:56,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:30:56,849 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:30:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:57,034 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-02 19:30:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:30:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 19:30:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:57,035 INFO L225 Difference]: With dead ends: 52 [2021-05-02 19:30:57,035 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 19:30:57,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:30:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 19:30:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 19:30:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:30:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-05-02 19:30:57,040 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 17 [2021-05-02 19:30:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:57,040 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-05-02 19:30:57,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:30:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-05-02 19:30:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:30:57,041 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:57,041 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:57,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:57,257 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:57,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2021-05-02 19:30:57,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:57,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439963254] [2021-05-02 19:30:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:57,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:57,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407815077] [2021-05-02 19:30:57,264 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 19:30:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:30:57,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:57,412 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 19:30:57,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:57,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439963254] [2021-05-02 19:30:57,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:57,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407815077] [2021-05-02 19:30:57,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407815077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:57,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:57,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:30:57,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405384884] [2021-05-02 19:30:57,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:30:57,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:30:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:30:57,414 INFO L87 Difference]: Start difference. First operand 51 states and 70 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), 3 states have call successors, (3) [2021-05-02 19:30:57,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:57,594 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-05-02 19:30:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:30:57,595 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), 3 states have call successors, (3) Word has length 22 [2021-05-02 19:30:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:57,597 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:30:57,597 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:30:57,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:30:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:30:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 19:30:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:30:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 19:30:57,610 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 19:30:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:57,610 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 19:30:57,611 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), 3 states have call successors, (3) [2021-05-02 19:30:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 19:30:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 19:30:57,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:57,611 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] [2021-05-02 19:30:57,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:57,826 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2021-05-02 19:30:57,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:57,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009999660] [2021-05-02 19:30:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:57,832 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:57,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037992223] [2021-05-02 19:30:57,832 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 19:30:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:57,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:30:57,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:57,998 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 19:30:57,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009999660] [2021-05-02 19:30:57,999 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037992223] [2021-05-02 19:30:57,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037992223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:57,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:57,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:30:57,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749672542] [2021-05-02 19:30:57,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:30:58,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:58,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:30:58,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:30:58,000 INFO L87 Difference]: Start difference. First operand 55 states and 73 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, (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 19:30:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:58,161 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-05-02 19:30:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:30:58,162 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, (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 19:30:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:58,163 INFO L225 Difference]: With dead ends: 60 [2021-05-02 19:30:58,163 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:30:58,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:30:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:30:58,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 19:30:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:30:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-05-02 19:30:58,168 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 27 [2021-05-02 19:30:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:58,168 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-05-02 19:30:58,169 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, (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 19:30:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-05-02 19:30:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 19:30:58,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:58,169 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:58,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:58,385 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:58,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2021-05-02 19:30:58,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:58,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529263971] [2021-05-02 19:30:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:58,405 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:58,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504486469] [2021-05-02 19:30:58,406 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 19:30:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:58,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:30:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:58,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:58,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:58,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:58,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:58,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:58,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:58,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:58,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-05-02 19:30:58,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:58,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529263971] [2021-05-02 19:30:58,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:58,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504486469] [2021-05-02 19:30:58,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504486469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:58,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:58,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 19:30:58,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776952662] [2021-05-02 19:30:58,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:30:58,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:58,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:30:58,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:30:58,557 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:30:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:58,592 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2021-05-02 19:30:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:30:58,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 19:30:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:58,593 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:30:58,593 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:30:58,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:30:58,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:30:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 19:30:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:30:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-05-02 19:30:58,597 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2021-05-02 19:30:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:58,597 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-05-02 19:30:58,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:30:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-05-02 19:30:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 19:30:58,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:58,598 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:58,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:58,809 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2021-05-02 19:30:58,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:58,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073096619] [2021-05-02 19:30:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:58,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:58,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689214756] [2021-05-02 19:30:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:30:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:58,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 19:30:58,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 19:30:58,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:58,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073096619] [2021-05-02 19:30:58,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:58,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689214756] [2021-05-02 19:30:58,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689214756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:58,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:58,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:30:58,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335946001] [2021-05-02 19:30:58,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:30:58,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:58,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:30:58,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:30:58,987 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:30:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:59,183 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-05-02 19:30:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:30:59,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 19:30:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:59,184 INFO L225 Difference]: With dead ends: 76 [2021-05-02 19:30:59,184 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 19:30:59,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:30:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 19:30:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 19:30:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:30:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2021-05-02 19:30:59,204 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 45 [2021-05-02 19:30:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:59,204 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2021-05-02 19:30:59,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:30:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2021-05-02 19:30:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:30:59,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:59,205 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:59,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:59,417 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2021-05-02 19:30:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:59,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861981683] [2021-05-02 19:30:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:59,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:59,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856522832] [2021-05-02 19:30:59,425 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 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 19:30:59,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:30:59,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:30:59,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:30:59,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:30:59,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:59,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861981683] [2021-05-02 19:30:59,606 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:59,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856522832] [2021-05-02 19:30:59,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856522832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:59,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:59,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:30:59,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847774360] [2021-05-02 19:30:59,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:30:59,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:30:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:30:59,607 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:30:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:59,857 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-05-02 19:30:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:30:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 19:30:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:59,860 INFO L225 Difference]: With dead ends: 80 [2021-05-02 19:30:59,860 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:30:59,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:30:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:30:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:30:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:30:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2021-05-02 19:30:59,881 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 50 [2021-05-02 19:30:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:59,881 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2021-05-02 19:30:59,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:30:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2021-05-02 19:30:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 19:30:59,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:59,885 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:00,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:00,086 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:00,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:00,086 INFO L82 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2021-05-02 19:31:00,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:00,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771271575] [2021-05-02 19:31:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:00,096 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:00,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751260782] [2021-05-02 19:31:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:31:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:00,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:31:00,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:00,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 9 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:31:00,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:00,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771271575] [2021-05-02 19:31:00,609 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:00,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751260782] [2021-05-02 19:31:00,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751260782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:00,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:00,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:31:00,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617787152] [2021-05-02 19:31:00,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:31:00,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:00,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:31:00,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:00,611 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:00,818 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 19:31:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:31:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2021-05-02 19:31:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:00,821 INFO L225 Difference]: With dead ends: 82 [2021-05-02 19:31:00,821 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 19:31:00,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:31:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 19:31:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 19:31:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:31:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-05-02 19:31:00,833 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 71 [2021-05-02 19:31:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:00,834 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-05-02 19:31:00,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-05-02 19:31:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 19:31:00,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:00,838 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:01,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:31:01,053 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:01,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1401496737, now seen corresponding path program 2 times [2021-05-02 19:31:01,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:01,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877107176] [2021-05-02 19:31:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:01,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:01,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499017028] [2021-05-02 19:31:01,060 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 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 19:31:01,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:31:01,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:31:01,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:31:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:01,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 60 proven. 112 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 19:31:01,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:01,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877107176] [2021-05-02 19:31:01,237 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:01,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499017028] [2021-05-02 19:31:01,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499017028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:01,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:01,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:31:01,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362050762] [2021-05-02 19:31:01,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:31:01,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:01,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:31:01,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:31:01,238 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:01,304 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-05-02 19:31:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:31:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2021-05-02 19:31:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:01,306 INFO L225 Difference]: With dead ends: 90 [2021-05-02 19:31:01,306 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 19:31:01,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:31:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 19:31:01,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-05-02 19:31:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:31:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2021-05-02 19:31:01,312 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 73 [2021-05-02 19:31:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:01,313 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2021-05-02 19:31:01,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2021-05-02 19:31:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 19:31:01,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:01,314 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:01,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:31:01,521 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:01,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2049786824, now seen corresponding path program 3 times [2021-05-02 19:31:01,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:01,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329901295] [2021-05-02 19:31:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:01,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:01,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179844848] [2021-05-02 19:31:01,527 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 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 19:31:01,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:31:01,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:31:01,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:31:01,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 51 proven. 17 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:31:01,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:01,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329901295] [2021-05-02 19:31:01,770 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:01,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179844848] [2021-05-02 19:31:01,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179844848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:01,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:01,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:31:01,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781610094] [2021-05-02 19:31:01,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:31:01,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:31:01,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:01,771 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:02,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:02,023 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2021-05-02 19:31:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:31:02,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2021-05-02 19:31:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:02,025 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:31:02,025 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 19:31:02,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:31:02,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 19:31:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 19:31:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 58 states have internal predecessors, (61), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 19:31:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2021-05-02 19:31:02,032 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 73 [2021-05-02 19:31:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:02,033 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2021-05-02 19:31:02,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2021-05-02 19:31:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 19:31:02,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:02,035 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 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] [2021-05-02 19:31:02,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:02,249 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:02,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:02,249 INFO L82 PathProgramCache]: Analyzing trace with hash -601883655, now seen corresponding path program 1 times [2021-05-02 19:31:02,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:02,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881570388] [2021-05-02 19:31:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:02,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:02,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355762468] [2021-05-02 19:31:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:31:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:02,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:31:02,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:02,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 53 proven. 12 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 19:31:02,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:02,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881570388] [2021-05-02 19:31:02,522 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:02,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355762468] [2021-05-02 19:31:02,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355762468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:02,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:02,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:31:02,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960686885] [2021-05-02 19:31:02,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:31:02,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:02,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:31:02,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:02,524 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:31:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:02,726 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2021-05-02 19:31:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:31:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 76 [2021-05-02 19:31:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:02,728 INFO L225 Difference]: With dead ends: 111 [2021-05-02 19:31:02,728 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 19:31:02,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:31:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 19:31:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 19:31:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 37 states have call successors, (37), 16 states have call predecessors, (37), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 19:31:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2021-05-02 19:31:02,732 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 76 [2021-05-02 19:31:02,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:02,732 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2021-05-02 19:31:02,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:31:02,733 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2021-05-02 19:31:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 19:31:02,733 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:02,733 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:02,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:02,949 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1157335722, now seen corresponding path program 4 times [2021-05-02 19:31:02,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:02,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999914578] [2021-05-02 19:31:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:02,955 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:02,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531447247] [2021-05-02 19:31:02,955 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 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