/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/fermat2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:45:09,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:45:09,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:45:09,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:45:09,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:45:09,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:45:09,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:45:09,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:45:09,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:45:09,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:45:09,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:45:09,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:45:09,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:45:09,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:45:09,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:45:09,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:45:09,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:45:09,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:45:09,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:45:09,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:45:09,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:45:09,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:45:09,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:45:09,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:45:09,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:45:09,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:45:09,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:45:09,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:45:09,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:45:09,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:45:09,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:45:09,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:45:09,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:45:09,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:45:09,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:45:09,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:45:09,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:45:09,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:45:09,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:45:09,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:45:09,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:45:09,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:45:09,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:45:09,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:45:09,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:45:09,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:45:09,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:45:09,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:45:09,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:45:09,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:45:09,131 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:45:09,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:45:09,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:45:09,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:45:09,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:45:09,457 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:45:09,457 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:45:09,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2021-05-02 20:45:09,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56dd3973d/e0f6c3d5636948dcb71f63713f522745/FLAG5e1996760 [2021-05-02 20:45:09,869 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:45:09,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2021-05-02 20:45:09,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56dd3973d/e0f6c3d5636948dcb71f63713f522745/FLAG5e1996760 [2021-05-02 20:45:10,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56dd3973d/e0f6c3d5636948dcb71f63713f522745 [2021-05-02 20:45:10,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:45:10,252 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:45:10,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:45:10,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:45:10,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:45:10,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73f37b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10, skipping insertion in model container [2021-05-02 20:45:10,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:45:10,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:45:10,363 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/fermat2-ll_unwindbound50.c[524,537] [2021-05-02 20:45:10,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:45:10,379 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:45:10,391 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/fermat2-ll_unwindbound50.c[524,537] [2021-05-02 20:45:10,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:45:10,404 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:45:10,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10 WrapperNode [2021-05-02 20:45:10,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:45:10,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:45:10,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:45:10,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:45:10,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:45:10,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:45:10,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:45:10,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:45:10,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10" (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 20:45:10,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:45:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:45:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:45:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:45:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:45:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:45:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:45:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:45:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:45:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:45:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:45:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:45:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:45:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:45:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:45:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:45:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:45:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:45:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:45:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:45:10,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:45:10,772 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:45:10,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:45:10 BoogieIcfgContainer [2021-05-02 20:45:10,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:45:10,773 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:45:10,773 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:45:10,774 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:45:10,775 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:45:10" (1/1) ... [2021-05-02 20:45:10,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:45:10 BasicIcfg [2021-05-02 20:45:10,798 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:45:10,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:45:10,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:45:10,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:45:10,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:45:10" (1/4) ... [2021-05-02 20:45:10,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4a0a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:45:10, skipping insertion in model container [2021-05-02 20:45:10,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:10" (2/4) ... [2021-05-02 20:45:10,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4a0a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:45:10, skipping insertion in model container [2021-05-02 20:45:10,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:45:10" (3/4) ... [2021-05-02 20:45:10,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4a0a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:45:10, skipping insertion in model container [2021-05-02 20:45:10,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:45:10" (4/4) ... [2021-05-02 20:45:10,824 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound50.cJordan [2021-05-02 20:45:10,828 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:45:10,830 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:45:10,840 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:45:10,867 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:45:10,867 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:45:10,867 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:45:10,867 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:45:10,867 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:45:10,867 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:45:10,867 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:45:10,868 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:45:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:45:10,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:45:10,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:10,896 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:10,896 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:10,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:10,903 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-02 20:45:10,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:10,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171238367] [2021-05-02 20:45:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:11,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:11,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741004860] [2021-05-02 20:45:11,013 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 20:45:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:11,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:45:11,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:45:11,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:11,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171238367] [2021-05-02 20:45:11,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:11,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741004860] [2021-05-02 20:45:11,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741004860] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:45:11,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:45:11,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:45:11,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432326170] [2021-05-02 20:45:11,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:45:11,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:45:11,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:45:11,233 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:45:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:11,255 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-02 20:45:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:45:11,256 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 20:45:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:11,261 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:45:11,261 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:45:11,262 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:45:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:45:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:45:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:45:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 20:45:11,323 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 20:45:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:11,324 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 20:45:11,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:45:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 20:45:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:45:11,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:11,326 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:11,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:45:11,541 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-02 20:45:11,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:11,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625183382] [2021-05-02 20:45:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:11,560 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:11,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492382041] [2021-05-02 20:45:11,561 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 20:45:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:11,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:45:11,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:11,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:11,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:11,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:11,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:11,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:45:11,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:11,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625183382] [2021-05-02 20:45:11,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:11,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492382041] [2021-05-02 20:45:11,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492382041] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:45:11,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:45:11,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:45:11,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560079059] [2021-05-02 20:45:11,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:45:11,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:11,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:45:11,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:45:11,722 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:45:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:11,732 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 20:45:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:45:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:45:11,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:11,733 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:45:11,733 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:45:11,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:45:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:45:11,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:45:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:45:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 20:45:11,738 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 20:45:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:11,739 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 20:45:11,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:45:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 20:45:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:45:11,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:11,740 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:11,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:11,963 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:11,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:11,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-02 20:45:11,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:11,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123976821] [2021-05-02 20:45:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:11,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:11,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265619278] [2021-05-02 20:45:11,975 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 20:45:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:12,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:45:12,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:12,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:45:12,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:12,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123976821] [2021-05-02 20:45:12,271 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:12,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265619278] [2021-05-02 20:45:12,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265619278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:12,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:12,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:45:12,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173872358] [2021-05-02 20:45:12,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:45:12,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:12,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:45:12,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:45:12,272 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:45:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:16,401 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 20:45:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:45:16,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:45:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:16,403 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:45:16,403 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:45:16,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:45:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:45:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 20:45:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:45:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 20:45:16,408 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 20:45:16,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:16,408 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 20:45:16,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:45:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 20:45:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:45:16,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:16,409 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:16,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:16,621 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-02 20:45:16,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:16,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040425345] [2021-05-02 20:45:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:16,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:16,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208527616] [2021-05-02 20:45:16,646 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 20:45:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:45:16,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:16,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:45:16,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:16,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040425345] [2021-05-02 20:45:16,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:16,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208527616] [2021-05-02 20:45:16,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208527616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:16,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:16,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:45:16,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133281068] [2021-05-02 20:45:16,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:45:16,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:16,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:45:16,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:45:16,961 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:45:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:31,072 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-05-02 20:45:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:45:31,072 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:45:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:31,074 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:45:31,074 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:45:31,074 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:45:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:45:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 20:45:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:45:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 20:45:31,078 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2021-05-02 20:45:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:31,078 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 20:45:31,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:45:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 20:45:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:45:31,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:31,079 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:31,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:31,289 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:31,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-02 20:45:31,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:31,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757459814] [2021-05-02 20:45:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:31,299 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:31,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252612418] [2021-05-02 20:45:31,300 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 20:45:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:31,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:45:31,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:45:31,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:31,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757459814] [2021-05-02 20:45:31,436 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:31,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252612418] [2021-05-02 20:45:31,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252612418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:31,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:31,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:45:31,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121866907] [2021-05-02 20:45:31,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:45:31,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:45:31,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:45:31,437 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:45:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:31,474 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 20:45:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:45:31,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:45:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:31,480 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:45:31,481 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:45:31,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:45:31,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:45:31,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 20:45:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:45:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-05-02 20:45:31,497 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 32 [2021-05-02 20:45:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:31,497 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-05-02 20:45:31,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:45:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-05-02 20:45:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:45:31,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:31,499 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:31,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:31,716 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:31,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1670019071, now seen corresponding path program 1 times [2021-05-02 20:45:31,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:31,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033423070] [2021-05-02 20:45:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:31,725 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:31,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131332360] [2021-05-02 20:45:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:45:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:31,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:31,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,816 WARN L205 SmtUtils]: Spent 26.87 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:45:58,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:45:58,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:58,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033423070] [2021-05-02 20:45:58,864 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:58,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131332360] [2021-05-02 20:45:58,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131332360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:58,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:58,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:45:58,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265365307] [2021-05-02 20:45:58,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:45:58,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:58,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:45:58,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:45:58,865 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:46:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:11,169 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2021-05-02 20:46:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:46:11,169 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:46:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:11,170 INFO L225 Difference]: With dead ends: 63 [2021-05-02 20:46:11,170 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 20:46:11,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 26974.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:46:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 20:46:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-05-02 20:46:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:46:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-02 20:46:11,175 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 32 [2021-05-02 20:46:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:11,175 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-02 20:46:11,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:46:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-02 20:46:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:46:11,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:11,176 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:11,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:11,385 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:11,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1737444544, now seen corresponding path program 1 times [2021-05-02 20:46:11,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:11,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952914118] [2021-05-02 20:46:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:11,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:11,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183439741] [2021-05-02 20:46:11,394 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 20:46:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:46:11,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:11,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:11,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:11,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:11,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:33,072 WARN L205 SmtUtils]: Spent 19.43 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:46:49,154 WARN L205 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 20:46:49,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:46:49,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:49,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952914118] [2021-05-02 20:46:49,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:49,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183439741] [2021-05-02 20:46:49,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183439741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:49,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:49,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:46:49,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571468534] [2021-05-02 20:46:49,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:46:49,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:49,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:46:49,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 20:46:49,212 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:47:35,481 WARN L205 SmtUtils]: Spent 11.85 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:48:22,803 WARN L205 SmtUtils]: Spent 26.14 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 20:49:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:09,466 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-05-02 20:49:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:49:09,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:49:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:09,467 INFO L225 Difference]: With dead ends: 64 [2021-05-02 20:49:09,467 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:49:09,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 104392.0ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 20:49:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:49:09,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-02 20:49:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 46 states have internal predecessors, (53), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:49:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-05-02 20:49:09,471 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 32 [2021-05-02 20:49:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:09,471 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-05-02 20:49:09,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:49:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-05-02 20:49:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:49:09,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:09,472 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:09,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:09,681 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1134321246, now seen corresponding path program 1 times [2021-05-02 20:49:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:09,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071658635] [2021-05-02 20:49:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:09,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:09,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381239458] [2021-05-02 20:49:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:49:09,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:09,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 20:49:09,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:09,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071658635] [2021-05-02 20:49:09,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:09,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381239458] [2021-05-02 20:49:09,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381239458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:09,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:09,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:49:09,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531924812] [2021-05-02 20:49:09,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:49:09,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:09,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:49:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:49:09,970 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:49:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:18,495 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-05-02 20:49:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:49:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-05-02 20:49:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:18,497 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:49:18,497 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:49:18,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:49:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:49:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-02 20:49:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:49:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-05-02 20:49:18,501 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 38 [2021-05-02 20:49:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:18,501 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-05-02 20:49:18,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:49:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-05-02 20:49:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:49:18,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:18,502 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:18,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:49:18,713 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-02 20:49:18,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:18,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136287406] [2021-05-02 20:49:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:18,719 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:18,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927327226] [2021-05-02 20:49:18,720 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 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 20:49:18,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:49:18,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:49:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:49:18,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:49:18,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:18,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136287406] [2021-05-02 20:49:18,846 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:18,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927327226] [2021-05-02 20:49:18,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927327226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:18,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:18,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:49:18,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630085910] [2021-05-02 20:49:18,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:49:18,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:49:18,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:49:18,847 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:49:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:18,884 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-05-02 20:49:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:49:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:49:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:18,886 INFO L225 Difference]: With dead ends: 70 [2021-05-02 20:49:18,886 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 20:49:18,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:49:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 20:49:18,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-02 20:49:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:49:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-05-02 20:49:18,889 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 41 [2021-05-02 20:49:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:18,889 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-05-02 20:49:18,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:49:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-05-02 20:49:18,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:49:18,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:18,890 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:19,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:19,106 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:19,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1378566036, now seen corresponding path program 2 times [2021-05-02 20:49:19,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:19,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563677145] [2021-05-02 20:49:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:19,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:19,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524164443] [2021-05-02 20:49:19,112 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 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 20:49:19,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:49:19,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:49:19,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:49:19,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:19,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:19,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:23,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:23,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:23,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:23,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:23,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:49:23,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:23,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563677145] [2021-05-02 20:49:23,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:23,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524164443] [2021-05-02 20:49:23,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524164443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:23,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:23,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:49:23,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149083988] [2021-05-02 20:49:23,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:49:23,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:23,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:49:23,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:49:23,726 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:49:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:40,504 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-05-02 20:49:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:49:40,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:49:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:40,505 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:49:40,505 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:49:40,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:49:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:49:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-05-02 20:49:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:49:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-05-02 20:49:40,512 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 41 [2021-05-02 20:49:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:40,512 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-05-02 20:49:40,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:49:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-05-02 20:49:40,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:49:40,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:40,513 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 20:49:40,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:40,728 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2028897579, now seen corresponding path program 1 times [2021-05-02 20:49:40,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:40,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727430776] [2021-05-02 20:49:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:40,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:40,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269971862] [2021-05-02 20:49:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:40,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:49:40,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:40,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:40,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:40,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:40,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:40,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:40,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:40,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:40,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:49:40,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:40,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727430776] [2021-05-02 20:49:40,889 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:40,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269971862] [2021-05-02 20:49:40,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269971862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:40,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:40,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:49:40,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823642125] [2021-05-02 20:49:40,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:49:40,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:40,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:49:40,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:49:40,890 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:49:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:40,909 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2021-05-02 20:49:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:49:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-02 20:49:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:40,910 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:49:40,911 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:49:40,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:49:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:49:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-05-02 20:49:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:49:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-05-02 20:49:40,919 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 41 [2021-05-02 20:49:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:40,920 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-05-02 20:49:40,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:49:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-05-02 20:49:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:49:40,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:40,921 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:41,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:49:41,136 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:41,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1755535540, now seen corresponding path program 2 times [2021-05-02 20:49:41,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:41,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298541830] [2021-05-02 20:49:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:41,141 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:41,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880438684] [2021-05-02 20:49:41,141 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:41,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:49:41,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:49:41,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:49:41,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:41,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,389 WARN L205 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:49:51,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:51,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,729 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 20:49:55,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:55,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:56,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,959 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 20:50:04,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:05,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,176 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* c_main_~u~0 c_main_~u~0) (* 2 c_main_~v~0)) (+ (* c_main_~v~0 c_main_~v~0) (* 4 c_main_~A~0) (* 4 c_main_~r~0) (* 2 c_main_~u~0))) (= c_main_~v~0 1) (exists ((aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 Int) (aux_div_v_main_~u~0_10_32 Int) (aux_div_aux_mod_v_main_~u~0_10_32_69 Int)) (let ((.cse3 (+ c_main_~A~0 c_main_~r~0)) (.cse0 (* 2 aux_div_v_main_~u~0_10_32)) (.cse5 (* 2 aux_div_aux_mod_v_main_~u~0_10_32_69)) (.cse4 (* 2 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91)) (.cse1 (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91)) (.cse2 (+ c_main_~A~0 c_main_~r~0 1))) (and (<= (+ .cse0 .cse1 c_main_~u~0) .cse2) (< .cse3 (+ .cse4 .cse1 c_main_~u~0 1)) (= (mod (+ c_main_~A~0 (* (- 1) aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91) c_main_~r~0 c_main_~u~0 1) 2) 0) (< .cse3 (+ .cse5 .cse1 c_main_~u~0 1)) (< (+ (* aux_div_v_main_~u~0_10_32 aux_div_v_main_~u~0_10_32) 1) (+ .cse0 c_main_~A~0)) (= (+ (* 2 (* c_main_~A~0 c_main_~u~0)) (* c_main_~v~0 c_main_~v~0) (* 2 (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 c_main_~A~0)) (* 2 .cse1) (* 2 c_main_~u~0) (* 4 (* aux_div_aux_mod_v_main_~u~0_10_32_69 aux_div_aux_mod_v_main_~u~0_10_32_69)) (* 2 (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 c_main_~r~0)) (* 2 (* c_main_~r~0 c_main_~u~0))) (+ (* 2 (* c_main_~A~0 c_main_~r~0)) (* c_main_~r~0 c_main_~r~0) (* 2 c_main_~r~0) (* 2 c_main_~v~0) (* c_main_~u~0 c_main_~u~0) (* 2 (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 c_main_~u~0)) (* 2 c_main_~A~0) (* c_main_~A~0 c_main_~A~0) (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91))) (< .cse3 (+ .cse0 .cse1 c_main_~u~0 1)) (<= (+ .cse5 .cse1 c_main_~u~0) .cse2) (<= (+ .cse4 .cse1 c_main_~u~0) .cse2))))) is different from false [2021-05-02 20:50:07,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2021-05-02 20:50:07,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:07,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298541830] [2021-05-02 20:50:07,563 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:07,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880438684] [2021-05-02 20:50:07,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880438684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:07,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:07,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:50:07,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139778713] [2021-05-02 20:50:07,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:50:07,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:07,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:50:07,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=4, NotChecked=22, Total=182 [2021-05-02 20:50:07,564 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:50:40,414 WARN L205 SmtUtils]: Spent 8.12 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:50:50,012 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 20:50:58,989 WARN L205 SmtUtils]: Spent 4.77 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 20:51:51,366 WARN L205 SmtUtils]: Spent 34.31 s on a formula simplification that was a NOOP. DAG size: 80 [2021-05-02 20:51:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:58,960 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-05-02 20:51:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:51:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:51:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:58,961 INFO L225 Difference]: With dead ends: 84 [2021-05-02 20:51:58,961 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:51:58,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 99688.1ms TimeCoverageRelationStatistics Valid=66, Invalid=345, Unknown=13, NotChecked=38, Total=462 [2021-05-02 20:51:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:51:58,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:51:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 64 states have internal predecessors, (70), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:51:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 20:51:58,964 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 41 [2021-05-02 20:51:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:58,964 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 20:51:58,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:51:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 20:51:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:51:58,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:58,965 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:59,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:59,180 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:59,180 INFO L82 PathProgramCache]: Analyzing trace with hash 489214531, now seen corresponding path program 3 times [2021-05-02 20:51:59,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:59,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442953230] [2021-05-02 20:51:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:59,195 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:59,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071798967] [2021-05-02 20:51:59,195 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true