/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/geo3-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:51:32,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:51:32,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:51:32,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:51:32,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:51:32,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:51:32,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:51:32,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:51:32,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:51:32,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:51:32,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:51:32,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:51:32,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:51:32,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:51:32,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:51:32,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:51:32,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:51:32,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:51:32,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:51:32,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:51:32,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:51:32,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:51:32,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:51:32,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:51:32,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:51:32,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:51:32,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:51:32,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:51:32,661 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:51:32,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:51:32,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:51:32,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:51:32,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:51:32,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:51:32,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:51:32,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:51:32,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:51:32,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:51:32,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:51:32,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:51:32,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:51:32,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:51:32,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:51:32,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:51:32,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:51:32,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:51:32,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:51:32,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:51:32,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:51:32,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:51:32,687 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:51:32,687 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:51:32,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:51:32,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:51:32,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:51:32,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:51:32,957 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:51:32,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound100.c [2021-05-02 20:51:32,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2369f49b8/f7d66ccd18e34502b4e2c973556d4848/FLAG4859eacc0 [2021-05-02 20:51:33,295 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:51:33,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound100.c [2021-05-02 20:51:33,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2369f49b8/f7d66ccd18e34502b4e2c973556d4848/FLAG4859eacc0 [2021-05-02 20:51:33,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2369f49b8/f7d66ccd18e34502b4e2c973556d4848 [2021-05-02 20:51:33,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:51:33,734 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:51:33,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:33,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:51:33,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:51:33,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:33" (1/1) ... [2021-05-02 20:51:33,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db0b872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33, skipping insertion in model container [2021-05-02 20:51:33,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:33" (1/1) ... [2021-05-02 20:51:33,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:51:33,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:51:33,853 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/geo3-ll_unwindbound100.c[525,538] [2021-05-02 20:51:33,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:33,870 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:51:33,879 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/geo3-ll_unwindbound100.c[525,538] [2021-05-02 20:51:33,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:33,899 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:51:33,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33 WrapperNode [2021-05-02 20:51:33,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:33,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:51:33,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:51:33,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:51:33,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33" (1/1) ... [2021-05-02 20:51:33,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33" (1/1) ... [2021-05-02 20:51:33,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33" (1/1) ... [2021-05-02 20:51:33,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33" (1/1) ... [2021-05-02 20:51:33,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33" (1/1) ... [2021-05-02 20:51:33,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33" (1/1) ... [2021-05-02 20:51:33,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33" (1/1) ... [2021-05-02 20:51:33,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:51:33,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:51:33,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:51:33,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:51:33,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33" (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 20:51:34,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:51:34,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:51:34,008 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:51:34,008 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:51:34,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:51:34,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:51:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:51:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:51:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:51:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:51:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:51:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:51:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:51:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:51:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:51:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:51:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:51:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:51:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:51:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:51:34,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:51:34,168 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:51:34,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:34 BoogieIcfgContainer [2021-05-02 20:51:34,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:51:34,169 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:51:34,169 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:51:34,170 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:51:34,172 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:34" (1/1) ... [2021-05-02 20:51:34,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:34 BasicIcfg [2021-05-02 20:51:34,181 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:51:34,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:51:34,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:51:34,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:51:34,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:51:33" (1/4) ... [2021-05-02 20:51:34,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f0d510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:34, skipping insertion in model container [2021-05-02 20:51:34,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:33" (2/4) ... [2021-05-02 20:51:34,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f0d510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:34, skipping insertion in model container [2021-05-02 20:51:34,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:34" (3/4) ... [2021-05-02 20:51:34,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f0d510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:51:34, skipping insertion in model container [2021-05-02 20:51:34,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:34" (4/4) ... [2021-05-02 20:51:34,186 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound100.cJordan [2021-05-02 20:51:34,189 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:51:34,191 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:51:34,200 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:51:34,211 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:51:34,211 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:51:34,211 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:51:34,211 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:51:34,211 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:51:34,211 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:51:34,211 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:51:34,212 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:51:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 20:51:34,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:34,223 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:34,223 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:34,226 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-02 20:51:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:34,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610307893] [2021-05-02 20:51:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:34,292 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:34,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696678052] [2021-05-02 20:51:34,292 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 20:51:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:34,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:51:34,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:34,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:34,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610307893] [2021-05-02 20:51:34,401 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:34,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696678052] [2021-05-02 20:51:34,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696678052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:34,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:34,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:51:34,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105416979] [2021-05-02 20:51:34,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:51:34,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:34,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:51:34,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:51:34,414 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:34,422 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 20:51:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:51:34,422 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 20:51:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:34,427 INFO L225 Difference]: With dead ends: 22 [2021-05-02 20:51:34,427 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 20:51:34,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 20:51:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 20:51:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 20:51:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:34,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 20:51:34,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 20:51:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:34,446 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 20:51:34,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:34,446 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 20:51:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:51:34,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:34,447 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:34,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:51:34,662 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:34,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:34,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-02 20:51:34,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:34,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432975042] [2021-05-02 20:51:34,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:34,676 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:34,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764861468] [2021-05-02 20:51:34,676 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 20:51:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:34,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:51:34,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:34,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:34,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432975042] [2021-05-02 20:51:34,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764861468] [2021-05-02 20:51:34,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764861468] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:34,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:34,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:51:34,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45818402] [2021-05-02 20:51:34,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:51:34,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:34,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:51:34,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:51:34,828 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:34,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:34,854 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 20:51:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:51:34,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:51:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:34,855 INFO L225 Difference]: With dead ends: 19 [2021-05-02 20:51:34,855 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 20:51:34,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:51:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 20:51:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 20:51:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 20:51:34,858 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 20:51:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:34,858 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 20:51:34,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 20:51:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:51:34,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:34,859 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:35,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:35,076 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-02 20:51:35,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:35,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383381673] [2021-05-02 20:51:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:35,086 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:35,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556620338] [2021-05-02 20:51:35,087 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 20:51:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 20:51:35,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:35,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:35,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:35,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383381673] [2021-05-02 20:51:35,167 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:35,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556620338] [2021-05-02 20:51:35,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556620338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:35,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:35,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:51:35,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873481100] [2021-05-02 20:51:35,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:51:35,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:51:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:51:35,168 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:35,190 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 20:51:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:51:35,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:51:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:35,191 INFO L225 Difference]: With dead ends: 26 [2021-05-02 20:51:35,191 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:51:35,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:51:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:51:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 20:51:35,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 20:51:35,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:35,197 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 20:51:35,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:35,197 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 20:51:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:51:35,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:35,197 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:35,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:35,413 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-02 20:51:35,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:35,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758839065] [2021-05-02 20:51:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:35,422 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:35,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762214897] [2021-05-02 20:51:35,422 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 20:51:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:51:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:35,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:35,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:35,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758839065] [2021-05-02 20:51:35,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:35,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762214897] [2021-05-02 20:51:35,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762214897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:35,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:35,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:51:35,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21077429] [2021-05-02 20:51:35,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:51:35,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:51:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:51:35,510 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:35,529 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-02 20:51:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:51:35,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:51:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:35,530 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:51:35,530 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:51:35,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:51:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:51:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 20:51:35,534 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 20:51:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:35,534 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 20:51:35,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 20:51:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:51:35,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:35,534 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:35,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:35,751 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:35,751 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-02 20:51:35,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:35,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259954542] [2021-05-02 20:51:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:35,761 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:35,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111259895] [2021-05-02 20:51:35,762 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 20:51:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:35,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:51:35,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:35,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:35,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:35,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259954542] [2021-05-02 20:51:35,898 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:35,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111259895] [2021-05-02 20:51:35,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111259895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:35,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:35,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:51:35,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397207961] [2021-05-02 20:51:35,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:51:35,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:35,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:51:35,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:35,899 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:35,959 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 20:51:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:51:35,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:51:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:35,961 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:51:35,961 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:51:35,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:51:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:51:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:51:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 20:51:35,964 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 20:51:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:35,964 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 20:51:35,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 20:51:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:51:35,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:35,965 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:36,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:36,180 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-02 20:51:36,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:36,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356571836] [2021-05-02 20:51:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:36,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:36,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341849308] [2021-05-02 20:51:36,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:36,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:51:36,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:36,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:51:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:36,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:36,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:36,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356571836] [2021-05-02 20:51:36,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:36,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341849308] [2021-05-02 20:51:36,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341849308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:36,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:36,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:51:36,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546300707] [2021-05-02 20:51:36,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:51:36,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:36,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:51:36,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:36,338 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:36,372 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-02 20:51:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:51:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:51:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:36,373 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:51:36,373 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:51:36,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:51:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:51:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:51:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 20:51:36,376 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-02 20:51:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:36,376 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 20:51:36,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 20:51:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:51:36,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:36,377 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:36,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:36,592 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:36,592 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-02 20:51:36,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:36,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176661871] [2021-05-02 20:51:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:36,598 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:36,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667546222] [2021-05-02 20:51:36,598 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 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 20:51:36,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:51:36,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:36,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:51:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:36,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:51:36,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:36,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176661871] [2021-05-02 20:51:36,796 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:36,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667546222] [2021-05-02 20:51:36,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667546222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:36,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:36,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:51:36,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983230869] [2021-05-02 20:51:36,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:51:36,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:36,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:51:36,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:36,797 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:52:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:04,449 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-02 20:52:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:52:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:52:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:04,450 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:52:04,450 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:52:04,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:52:04,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:52:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:52:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:52:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 20:52:04,453 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 28 [2021-05-02 20:52:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:04,453 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 20:52:04,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:52:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 20:52:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:52:04,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:04,454 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:04,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:04,658 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1187551519, now seen corresponding path program 1 times [2021-05-02 20:52:04,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:04,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078674112] [2021-05-02 20:52:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:04,672 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:04,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932649744] [2021-05-02 20:52:04,672 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 20:52:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:04,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:52:04,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:04,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:04,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:52:04,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:04,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078674112] [2021-05-02 20:52:04,851 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:04,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932649744] [2021-05-02 20:52:04,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932649744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:04,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:04,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:52:04,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881270898] [2021-05-02 20:52:04,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:04,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:04,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:04,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:04,854 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:52:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:06,909 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-05-02 20:52:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:06,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2021-05-02 20:52:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:06,911 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:52:06,911 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:52:06,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:52:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:52:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:52:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 20:52:06,914 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2021-05-02 20:52:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:06,914 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 20:52:06,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:52:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 20:52:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:06,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:06,915 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:07,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:52:07,125 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-02 20:52:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:07,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070253535] [2021-05-02 20:52:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:07,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:07,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341162458] [2021-05-02 20:52:07,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:07,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:52:07,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:07,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:52:07,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:10,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:14,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:14,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:14,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:14,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:14,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:14,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:27,911 WARN L205 SmtUtils]: Spent 10.35 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:52:27,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:27,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:29,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:31,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:32,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,987 WARN L205 SmtUtils]: Spent 10.18 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:52:42,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,085 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from false [2021-05-02 20:52:51,093 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from true [2021-05-02 20:52:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:52:51,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070253535] [2021-05-02 20:52:51,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341162458] [2021-05-02 20:52:51,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341162458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:51,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:51,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:52:51,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119361885] [2021-05-02 20:52:51,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:52:51,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:52:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=4, NotChecked=14, Total=90 [2021-05-02 20:52:51,095 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:52:55,214 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 37 DAG size of output: 3 [2021-05-02 20:53:03,344 WARN L205 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 20:53:33,282 WARN L205 SmtUtils]: Spent 16.36 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 20:55:19,559 WARN L205 SmtUtils]: Spent 1.46 m on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 20:55:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:55:21,563 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-02 20:55:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:55:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:55:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:55:21,602 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:55:21,602 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 20:55:21,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 158397.9ms TimeCoverageRelationStatistics Valid=46, Invalid=130, Unknown=10, NotChecked=24, Total=210 [2021-05-02 20:55:21,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 20:55:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 20:55:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:55:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 20:55:21,605 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 20:55:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:55:21,605 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 20:55:21,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:55:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 20:55:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:55:21,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:55:21,606 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:55:21,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:55:21,809 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:55:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:55:21,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2081254464, now seen corresponding path program 3 times [2021-05-02 20:55:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:55:21,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869548661] [2021-05-02 20:55:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:55:21,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:55:21,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121509775] [2021-05-02 20:55:21,816 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 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 20:55:21,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:55:21,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:55:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:55:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:55:24,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:36,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:36,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:36,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:36,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:36,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:36,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:36,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:38,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:38,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:38,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:38,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:38,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:38,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:38,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:38,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,979 WARN L205 SmtUtils]: Spent 10.71 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 20:55:51,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:54,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:56,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:13,808 WARN L205 SmtUtils]: Spent 10.33 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 20:56:13,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:13,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:15,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:15,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:15,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:15,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:15,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:15,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:15,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:17,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:17,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:17,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:17,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:17,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:18,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:18,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:20,050 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from false [2021-05-02 20:56:23,336 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from true [2021-05-02 20:56:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:56:23,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:23,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869548661] [2021-05-02 20:56:23,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:23,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121509775] [2021-05-02 20:56:23,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121509775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:23,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:23,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:56:23,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003564060] [2021-05-02 20:56:23,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:56:23,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:23,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:56:23,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=50, Unknown=7, NotChecked=14, Total=90 [2021-05-02 20:56:23,338 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:29,664 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 45 DAG size of output: 6 [2021-05-02 20:57:39,307 WARN L205 SmtUtils]: Spent 49.93 s on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-02 20:58:03,044 WARN L205 SmtUtils]: Spent 21.21 s on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 20:58:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:07,095 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 20:58:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:58:07,128 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:58:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:07,128 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:58:07,128 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:58:07,128 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 125883.7ms TimeCoverageRelationStatistics Valid=41, Invalid=107, Unknown=12, NotChecked=22, Total=182 [2021-05-02 20:58:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:58:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:58:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:58:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:58:07,129 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 20:58:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:07,129 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:58:07,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:58:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:58:07,129 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:58:07,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:58:07,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:58:07 BasicIcfg [2021-05-02 20:58:07,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:58:07,333 INFO L168 Benchmark]: Toolchain (without parser) took 393600.30 ms. Allocated memory was 190.8 MB in the beginning and 240.1 MB in the end (delta: 49.3 MB). Free memory was 155.9 MB in the beginning and 95.4 MB in the end (delta: 60.5 MB). Peak memory consumption was 110.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:07,333 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:58:07,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.66 ms. Allocated memory is still 190.8 MB. Free memory was 155.7 MB in the beginning and 146.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:07,334 INFO L168 Benchmark]: Boogie Preprocessor took 51.17 ms. Allocated memory is still 190.8 MB. Free memory was 145.9 MB in the beginning and 174.3 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:07,334 INFO L168 Benchmark]: RCFGBuilder took 215.99 ms. Allocated memory is still 190.8 MB. Free memory was 174.3 MB in the beginning and 159.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:07,334 INFO L168 Benchmark]: IcfgTransformer took 12.13 ms. Allocated memory is still 190.8 MB. Free memory was 159.6 MB in the beginning and 158.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:07,334 INFO L168 Benchmark]: TraceAbstraction took 393150.65 ms. Allocated memory was 190.8 MB in the beginning and 240.1 MB in the end (delta: 49.3 MB). Free memory was 157.9 MB in the beginning and 95.4 MB in the end (delta: 62.5 MB). Peak memory consumption was 112.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:07,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 164.66 ms. Allocated memory is still 190.8 MB. Free memory was 155.7 MB in the beginning and 146.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.17 ms. Allocated memory is still 190.8 MB. Free memory was 145.9 MB in the beginning and 174.3 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 215.99 ms. Allocated memory is still 190.8 MB. Free memory was 174.3 MB in the beginning and 159.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.13 ms. Allocated memory is still 190.8 MB. Free memory was 159.6 MB in the beginning and 158.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 393150.65 ms. Allocated memory was 190.8 MB in the beginning and 240.1 MB in the end (delta: 49.3 MB). Free memory was 157.9 MB in the beginning and 95.4 MB in the end (delta: 62.5 MB). Peak memory consumption was 112.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 393120.0ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 9.7ms, AutomataDifference: 284203.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 174 SDtfs, 83 SDslu, 550 SDs, 0 SdLazy, 278 SolverSat, 27 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 69166.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 284484.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 109.2ms SsaConstructionTime, 360.9ms SatisfiabilityAnalysisTime, 105827.7ms InterpolantComputationTime, 237 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 227 ConstructedInterpolants, 6 QuantifiedInterpolants, 1739 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1366 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 115/148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...