/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/fermat1-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:34:24,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:34:24,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:34:24,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:34:24,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:34:24,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:34:24,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:34:24,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:34:24,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:34:24,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:34:24,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:34:24,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:34:24,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:34:24,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:34:24,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:34:24,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:34:24,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:34:24,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:34:24,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:34:24,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:34:24,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:34:24,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:34:24,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:34:24,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:34:24,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:34:24,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:34:24,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:34:24,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:34:24,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:34:24,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:34:24,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:34:24,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:34:24,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:34:24,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:34:24,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:34:24,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:34:24,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:34:24,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:34:24,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:34:24,174 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:34:24,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:34:24,174 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:34:24,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:34:24,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:34:24,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:34:24,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:34:24,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:34:24,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:34:24,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:34:24,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:34:24,177 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:34:24,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:34:24,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:34:24,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:34:24,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:34:24,480 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:34:24,480 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:34:24,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound5.c [2021-05-02 20:34:24,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a6bd089/276d505c3d394053b85abc439bbd00dc/FLAG703213a4a [2021-05-02 20:34:25,012 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:34:25,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound5.c [2021-05-02 20:34:25,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a6bd089/276d505c3d394053b85abc439bbd00dc/FLAG703213a4a [2021-05-02 20:34:25,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a6bd089/276d505c3d394053b85abc439bbd00dc [2021-05-02 20:34:25,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:34:25,047 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:34:25,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:25,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:34:25,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:34:25,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b60f224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25, skipping insertion in model container [2021-05-02 20:34:25,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:34:25,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:34:25,196 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/fermat1-ll_unwindbound5.c[535,548] [2021-05-02 20:34:25,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:25,221 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:34:25,245 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/fermat1-ll_unwindbound5.c[535,548] [2021-05-02 20:34:25,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:25,264 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:34:25,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25 WrapperNode [2021-05-02 20:34:25,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:25,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:34:25,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:34:25,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:34:25,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:34:25,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:34:25,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:34:25,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:34:25,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25" (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 20:34:25,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:34:25,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:34:25,418 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:34:25,418 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:34:25,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:34:25,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:34:25,418 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:34:25,418 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:34:25,418 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:34:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:34:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:34:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:34:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:34:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:34:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:34:25,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:34:25,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:34:25,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:34:25,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:34:25,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:34:25,728 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:34:25,728 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:34:25,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:25 BoogieIcfgContainer [2021-05-02 20:34:25,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:34:25,730 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:34:25,731 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:34:25,731 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:34:25,750 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:25" (1/1) ... [2021-05-02 20:34:25,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:25 BasicIcfg [2021-05-02 20:34:25,778 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:34:25,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:34:25,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:34:25,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:34:25,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:34:25" (1/4) ... [2021-05-02 20:34:25,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43083105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:25, skipping insertion in model container [2021-05-02 20:34:25,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:25" (2/4) ... [2021-05-02 20:34:25,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43083105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:25, skipping insertion in model container [2021-05-02 20:34:25,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:25" (3/4) ... [2021-05-02 20:34:25,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43083105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:34:25, skipping insertion in model container [2021-05-02 20:34:25,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:25" (4/4) ... [2021-05-02 20:34:25,794 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound5.cJordan [2021-05-02 20:34:25,798 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:34:25,802 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:34:25,821 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:34:25,852 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:34:25,852 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:34:25,852 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:34:25,852 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:34:25,852 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:34:25,852 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:34:25,853 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:34:25,853 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:34:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:34:25,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:34:25,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:25,878 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:25,879 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:25,886 INFO L82 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2021-05-02 20:34:25,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:25,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870924634] [2021-05-02 20:34:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:26,005 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:26,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84482622] [2021-05-02 20:34:26,006 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 20:34:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:26,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:34:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:34:26,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:26,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870924634] [2021-05-02 20:34:26,199 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:26,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84482622] [2021-05-02 20:34:26,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84482622] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:26,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:26,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:34:26,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861985922] [2021-05-02 20:34:26,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:34:26,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:34:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:34:26,217 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:26,230 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-02 20:34:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:34:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 20:34:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:26,237 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:34:26,238 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:34:26,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:34:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:34:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:34:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:34:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 20:34:26,267 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-02 20:34:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:26,268 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 20:34:26,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 20:34:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:34:26,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:26,269 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:26,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:34:26,493 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2021-05-02 20:34:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:26,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071826071] [2021-05-02 20:34:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:26,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:26,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036655504] [2021-05-02 20:34:26,530 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 20:34:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:34:26,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:26,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:26,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:26,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:26,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:34:26,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:26,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071826071] [2021-05-02 20:34:26,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:26,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036655504] [2021-05-02 20:34:26,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036655504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:26,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:26,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:34:26,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935179048] [2021-05-02 20:34:26,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:34:26,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:26,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:34:26,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:34:26,743 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:26,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:26,757 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-05-02 20:34:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:34:26,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:34:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:26,759 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:34:26,759 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:34:26,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:34:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:34:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:34:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:34:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 20:34:26,765 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-02 20:34:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:26,766 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 20:34:26,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 20:34:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:34:26,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:26,768 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:26,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:26,987 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:26,988 INFO L82 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2021-05-02 20:34:26,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:26,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111696565] [2021-05-02 20:34:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:27,008 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:27,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189347648] [2021-05-02 20:34:27,008 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 20:34:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:27,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:34:27,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:27,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:27,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:27,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:27,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:34:27,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:27,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111696565] [2021-05-02 20:34:27,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:27,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189347648] [2021-05-02 20:34:27,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189347648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:27,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:27,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:27,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655855735] [2021-05-02 20:34:27,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:27,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:27,281 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:37,834 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-05-02 20:34:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:34:37,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:34:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:37,836 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:34:37,836 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 20:34:37,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 20:34:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 20:34:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:34:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-02 20:34:37,844 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-02 20:34:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:37,844 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-02 20:34:37,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:34:37,844 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-02 20:34:37,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:34:37,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:37,845 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:38,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:38,046 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:38,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:38,047 INFO L82 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2021-05-02 20:34:38,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:38,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885223433] [2021-05-02 20:34:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:38,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:38,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319193587] [2021-05-02 20:34:38,055 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 20:34:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:38,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:34:38,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:38,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:34:38,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:38,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885223433] [2021-05-02 20:34:38,410 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:38,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319193587] [2021-05-02 20:34:38,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319193587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:38,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:38,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:34:38,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865651755] [2021-05-02 20:34:38,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:34:38,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:34:38,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:38,413 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:34:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:53,113 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-02 20:34:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:34:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:34:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:53,116 INFO L225 Difference]: With dead ends: 70 [2021-05-02 20:34:53,116 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:34:53,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:34:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:34:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-05-02 20:34:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 47 states have internal predecessors, (57), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:34:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2021-05-02 20:34:53,124 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 29 [2021-05-02 20:34:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:53,124 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2021-05-02 20:34:53,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:34:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2021-05-02 20:34:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:34:53,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:53,126 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:53,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:53,348 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:53,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2021-05-02 20:34:53,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:53,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732690478] [2021-05-02 20:34:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:53,359 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:53,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546280780] [2021-05-02 20:34:53,360 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 20:34:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:34:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:53,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:34:53,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:53,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732690478] [2021-05-02 20:34:53,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:53,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546280780] [2021-05-02 20:34:53,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546280780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:53,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:53,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:34:53,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853747799] [2021-05-02 20:34:53,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:34:53,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:53,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:34:53,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:53,502 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:34:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:53,543 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-05-02 20:34:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:34:53,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 20:34:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:53,547 INFO L225 Difference]: With dead ends: 71 [2021-05-02 20:34:53,547 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 20:34:53,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 20:34:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 20:34:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 53 states have internal predecessors, (63), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:34:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-05-02 20:34:53,568 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 35 [2021-05-02 20:34:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:53,568 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-05-02 20:34:53,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:34:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-05-02 20:34:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:34:53,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:53,572 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:53,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:53,793 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:53,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:53,794 INFO L82 PathProgramCache]: Analyzing trace with hash -827702321, now seen corresponding path program 1 times [2021-05-02 20:34:53,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:53,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965201449] [2021-05-02 20:34:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:53,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:53,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925538508] [2021-05-02 20:34:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:34:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:53,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:54,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,173 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 20:34:58,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:34:58,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:58,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965201449] [2021-05-02 20:34:58,306 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:58,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925538508] [2021-05-02 20:34:58,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925538508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:58,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:58,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:34:58,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589839566] [2021-05-02 20:34:58,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:34:58,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:58,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:34:58,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:58,308 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:35:06,736 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 20:35:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:11,905 INFO L93 Difference]: Finished difference Result 102 states and 134 transitions. [2021-05-02 20:35:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:35:11,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-02 20:35:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:11,907 INFO L225 Difference]: With dead ends: 102 [2021-05-02 20:35:11,907 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 20:35:11,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 6560.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:35:11,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 20:35:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-05-02 20:35:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 77 states have internal predecessors, (92), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 13 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:35:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2021-05-02 20:35:11,930 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 39 [2021-05-02 20:35:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:11,930 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2021-05-02 20:35:11,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:35:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2021-05-02 20:35:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:35:11,931 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:11,931 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:12,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:12,137 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:12,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:12,138 INFO L82 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2021-05-02 20:35:12,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:12,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600946147] [2021-05-02 20:35:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:12,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:12,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582125465] [2021-05-02 20:35:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:12,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:35:12,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:12,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:35:12,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:12,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600946147] [2021-05-02 20:35:12,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:12,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582125465] [2021-05-02 20:35:12,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582125465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:12,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:12,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:35:12,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208092028] [2021-05-02 20:35:12,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:35:12,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:12,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:35:12,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:35:12,280 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:35:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:12,342 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2021-05-02 20:35:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:35:12,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:35:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:12,344 INFO L225 Difference]: With dead ends: 109 [2021-05-02 20:35:12,344 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 20:35:12,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:35:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 20:35:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-05-02 20:35:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 83 states have internal predecessors, (99), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (20), 14 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 20:35:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2021-05-02 20:35:12,350 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 41 [2021-05-02 20:35:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:12,351 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2021-05-02 20:35:12,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:35:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2021-05-02 20:35:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:35:12,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:12,352 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:12,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:12,574 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2021-05-02 20:35:12,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:12,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893341827] [2021-05-02 20:35:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:12,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847207897] [2021-05-02 20:35:12,585 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 20:35:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:35:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:12,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:35:12,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:12,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893341827] [2021-05-02 20:35:12,729 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:12,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847207897] [2021-05-02 20:35:12,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847207897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:12,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:12,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:35:12,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781663773] [2021-05-02 20:35:12,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:35:12,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:12,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:35:12,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:35:12,731 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:35:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:12,776 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2021-05-02 20:35:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:35:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2021-05-02 20:35:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:12,777 INFO L225 Difference]: With dead ends: 110 [2021-05-02 20:35:12,777 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 20:35:12,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:35:12,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 20:35:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 20:35:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.294871794871795) internal successors, (101), 85 states have internal predecessors, (101), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (20), 14 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 20:35:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2021-05-02 20:35:12,784 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 43 [2021-05-02 20:35:12,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:12,784 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2021-05-02 20:35:12,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:35:12,784 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2021-05-02 20:35:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:35:12,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:12,785 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:13,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:35:13,001 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2021-05-02 20:35:13,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:13,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210775716] [2021-05-02 20:35:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:13,021 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:13,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030213421] [2021-05-02 20:35:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:35:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 20:35:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:13,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:35:13,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:13,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210775716] [2021-05-02 20:35:13,173 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:13,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030213421] [2021-05-02 20:35:13,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030213421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:35:13,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:35:13,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:35:13,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678205770] [2021-05-02 20:35:13,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:35:13,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:13,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:35:13,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:35:13,174 INFO L87 Difference]: Start difference. First operand 110 states and 143 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:35:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:13,208 INFO L93 Difference]: Finished difference Result 132 states and 178 transitions. [2021-05-02 20:35:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:35:13,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 20:35:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:13,209 INFO L225 Difference]: With dead ends: 132 [2021-05-02 20:35:13,209 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 20:35:13,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:35:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 20:35:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 83. [2021-05-02 20:35:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 62 states have internal predecessors, (72), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:35:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2021-05-02 20:35:13,215 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 47 [2021-05-02 20:35:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:13,216 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2021-05-02 20:35:13,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:35:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2021-05-02 20:35:13,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:35:13,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:13,217 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:13,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:13,440 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:13,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1922781660, now seen corresponding path program 1 times [2021-05-02 20:35:13,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:13,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178809452] [2021-05-02 20:35:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:13,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:13,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49619170] [2021-05-02 20:35:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:13,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:35:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:13,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:23,744 WARN L205 SmtUtils]: Spent 8.05 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:35:23,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:23,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,031 WARN L205 SmtUtils]: Spent 6.06 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 20:35:38,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 7 refuted. 3 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 20:35:38,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:38,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178809452] [2021-05-02 20:35:38,157 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:38,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49619170] [2021-05-02 20:35:38,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49619170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:38,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:38,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:35:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405651480] [2021-05-02 20:35:38,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:35:38,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:35:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 20:35:38,158 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:36:35,937 WARN L205 SmtUtils]: Spent 16.78 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:37:19,165 WARN L205 SmtUtils]: Spent 13.44 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 20:38:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:29,309 INFO L93 Difference]: Finished difference Result 157 states and 215 transitions. [2021-05-02 20:38:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:38:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2021-05-02 20:38:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:29,311 INFO L225 Difference]: With dead ends: 157 [2021-05-02 20:38:29,311 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 20:38:29,311 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84553.6ms TimeCoverageRelationStatistics Valid=52, Invalid=240, Unknown=14, NotChecked=0, Total=306 [2021-05-02 20:38:29,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 20:38:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 121. [2021-05-02 20:38:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 17 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:38:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 158 transitions. [2021-05-02 20:38:29,318 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 158 transitions. Word has length 47 [2021-05-02 20:38:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:29,318 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 158 transitions. [2021-05-02 20:38:29,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:38:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 158 transitions. [2021-05-02 20:38:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:38:29,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:29,319 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:29,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:29,525 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1802828170, now seen corresponding path program 2 times [2021-05-02 20:38:29,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:29,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617510088] [2021-05-02 20:38:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:29,533 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:29,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874607685] [2021-05-02 20:38:29,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:29,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:38:29,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:38:29,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:38:29,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:29,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:29,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 20:38:30,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:38:30,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617510088] [2021-05-02 20:38:30,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:38:30,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874607685] [2021-05-02 20:38:30,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874607685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:38:30,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:38:30,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:38:30,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195472011] [2021-05-02 20:38:30,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:38:30,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:38:30,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:38:30,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:38:30,199 INFO L87 Difference]: Start difference. First operand 121 states and 158 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:38:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:54,419 INFO L93 Difference]: Finished difference Result 232 states and 327 transitions. [2021-05-02 20:38:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:38:54,420 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2021-05-02 20:38:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:54,421 INFO L225 Difference]: With dead ends: 232 [2021-05-02 20:38:54,422 INFO L226 Difference]: Without dead ends: 232 [2021-05-02 20:38:54,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:38:54,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-02 20:38:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 214. [2021-05-02 20:38:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 153 states have (on average 1.3529411764705883) internal successors, (207), 168 states have internal predecessors, (207), 49 states have call successors, (49), 12 states have call predecessors, (49), 11 states have return successors, (47), 33 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 20:38:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 303 transitions. [2021-05-02 20:38:54,431 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 303 transitions. Word has length 47 [2021-05-02 20:38:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:54,432 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 303 transitions. [2021-05-02 20:38:54,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:38:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 303 transitions. [2021-05-02 20:38:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:38:54,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:54,433 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:54,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:38:54,649 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:54,649 INFO L82 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2021-05-02 20:38:54,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:54,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002236918] [2021-05-02 20:38:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:54,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:54,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035848697] [2021-05-02 20:38:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:38:54,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:38:54,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:54,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:38:54,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:38:54,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002236918] [2021-05-02 20:38:54,838 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:38:54,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035848697] [2021-05-02 20:38:54,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035848697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:38:54,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:38:54,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:38:54,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706327263] [2021-05-02 20:38:54,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:38:54,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:38:54,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:38:54,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:38:54,840 INFO L87 Difference]: Start difference. First operand 214 states and 303 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:38:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:54,923 INFO L93 Difference]: Finished difference Result 193 states and 267 transitions. [2021-05-02 20:38:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:38:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2021-05-02 20:38:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:54,926 INFO L225 Difference]: With dead ends: 193 [2021-05-02 20:38:54,926 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 20:38:54,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:38:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 20:38:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 20:38:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.3333333333333333) internal successors, (184), 149 states have internal predecessors, (184), 42 states have call successors, (42), 12 states have call predecessors, (42), 11 states have return successors, (40), 30 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 20:38:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 266 transitions. [2021-05-02 20:38:54,938 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 266 transitions. Word has length 49 [2021-05-02 20:38:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:54,938 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 266 transitions. [2021-05-02 20:38:54,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:38:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 266 transitions. [2021-05-02 20:38:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:38:54,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:54,939 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:55,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:55,157 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1993056519, now seen corresponding path program 2 times [2021-05-02 20:38:55,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:55,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253395975] [2021-05-02 20:38:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:55,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:55,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867359244] [2021-05-02 20:38:55,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:55,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:38:55,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:38:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:38:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:55,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:38:55,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:38:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253395975] [2021-05-02 20:38:55,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:38:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867359244] [2021-05-02 20:38:55,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867359244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:38:55,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:38:55,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:38:55,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945203850] [2021-05-02 20:38:55,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:38:55,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:38:55,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:38:55,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:38:55,369 INFO L87 Difference]: Start difference. First operand 192 states and 266 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:38:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:55,457 INFO L93 Difference]: Finished difference Result 194 states and 268 transitions. [2021-05-02 20:38:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:38:55,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2021-05-02 20:38:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:55,459 INFO L225 Difference]: With dead ends: 194 [2021-05-02 20:38:55,459 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 20:38:55,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:38:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 20:38:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-05-02 20:38:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 140 states have (on average 1.3285714285714285) internal successors, (186), 151 states have internal predecessors, (186), 42 states have call successors, (42), 12 states have call predecessors, (42), 11 states have return successors, (40), 30 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 20:38:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 268 transitions. [2021-05-02 20:38:55,466 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 268 transitions. Word has length 51 [2021-05-02 20:38:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:55,467 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 268 transitions. [2021-05-02 20:38:55,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:38:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 268 transitions. [2021-05-02 20:38:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:38:55,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:55,468 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:55,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:38:55,681 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:55,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2021-05-02 20:38:55,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:55,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721902983] [2021-05-02 20:38:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:55,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:55,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664949551] [2021-05-02 20:38:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:38:55,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:38:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:55,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:38:55,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:38:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721902983] [2021-05-02 20:38:55,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:38:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664949551] [2021-05-02 20:38:55,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664949551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:38:55,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:38:55,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:38:55,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948140839] [2021-05-02 20:38:55,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:38:55,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:38:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:38:55,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:38:55,906 INFO L87 Difference]: Start difference. First operand 194 states and 268 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 20:38:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:56,010 INFO L93 Difference]: Finished difference Result 215 states and 292 transitions. [2021-05-02 20:38:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:38:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2021-05-02 20:38:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:56,012 INFO L225 Difference]: With dead ends: 215 [2021-05-02 20:38:56,012 INFO L226 Difference]: Without dead ends: 215 [2021-05-02 20:38:56,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:38:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-02 20:38:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2021-05-02 20:38:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 152 states have (on average 1.3157894736842106) internal successors, (200), 163 states have internal predecessors, (200), 44 states have call successors, (44), 14 states have call predecessors, (44), 13 states have return successors, (42), 32 states have call predecessors, (42), 42 states have call successors, (42) [2021-05-02 20:38:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 286 transitions. [2021-05-02 20:38:56,031 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 286 transitions. Word has length 55 [2021-05-02 20:38:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:56,031 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 286 transitions. [2021-05-02 20:38:56,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 20:38:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 286 transitions. [2021-05-02 20:38:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:38:56,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:56,032 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:56,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:56,245 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash -764146297, now seen corresponding path program 2 times [2021-05-02 20:38:56,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:56,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098351048] [2021-05-02 20:38:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:56,252 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:56,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11775527] [2021-05-02 20:38:56,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:56,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:38:56,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:38:56,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 20:38:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:56,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:56,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:56,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:56,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,710 WARN L205 SmtUtils]: Spent 8.16 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:39:06,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:22,164 WARN L205 SmtUtils]: Spent 7.31 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 20:39:22,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:22,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:50,221 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 20:39:50,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:50,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 14 refuted. 7 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 20:39:50,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:39:50,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098351048] [2021-05-02 20:39:50,305 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:39:50,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11775527] [2021-05-02 20:39:50,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11775527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:39:50,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:39:50,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:39:50,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694431883] [2021-05-02 20:39:50,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:39:50,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:39:50,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:39:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=121, Unknown=10, NotChecked=0, Total=156 [2021-05-02 20:39:50,306 INFO L87 Difference]: Start difference. First operand 210 states and 286 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 20:40:35,219 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (div (+ c_main_~u~0 (- 1)) 2))) (let ((.cse0 (* .cse1 .cse1))) (and (< (+ (* c_main_~R~0 c_main_~R~0) 1) (+ c_main_~A~0 (* 2 c_main_~R~0))) (= (+ c_main_~A~0 c_main_~r~0) .cse0) (< (+ .cse0 1) (+ c_main_~A~0 (* 2 .cse1))) (= (+ (* c_main_~u~0 c_main_~u~0) (* 2 c_main_~v~0)) (+ (* c_main_~v~0 c_main_~v~0) (* 4 c_main_~A~0) (* 4 c_main_~r~0) (* 2 c_main_~u~0))) (= c_main_~v~0 1) (= (mod (+ c_main_~u~0 1) 2) 0)))) is different from false [2021-05-02 20:43:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:41,200 INFO L93 Difference]: Finished difference Result 274 states and 380 transitions. [2021-05-02 20:43:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:43:41,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2021-05-02 20:43:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:41,202 INFO L225 Difference]: With dead ends: 274 [2021-05-02 20:43:41,202 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 20:43:41,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 62756.1ms TimeCoverageRelationStatistics Valid=46, Invalid=216, Unknown=14, NotChecked=30, Total=306 [2021-05-02 20:43:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 20:43:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2021-05-02 20:43:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 197 states have (on average 1.3350253807106598) internal successors, (263), 211 states have internal predecessors, (263), 58 states have call successors, (58), 16 states have call predecessors, (58), 15 states have return successors, (56), 43 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 20:43:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 377 transitions. [2021-05-02 20:43:41,210 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 377 transitions. Word has length 55 [2021-05-02 20:43:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:41,210 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 377 transitions. [2021-05-02 20:43:41,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 20:43:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 377 transitions. [2021-05-02 20:43:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:43:41,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:41,211 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:41,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 20:43:41,425 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:41,426 INFO L82 PathProgramCache]: Analyzing trace with hash -314671741, now seen corresponding path program 1 times [2021-05-02 20:43:41,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:41,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538186813] [2021-05-02 20:43:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:41,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:41,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459498670] [2021-05-02 20:43:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:43:41,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:43:41,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:41,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:43:41,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:41,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538186813] [2021-05-02 20:43:41,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:41,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459498670] [2021-05-02 20:43:41,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459498670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:41,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:41,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-02 20:43:41,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371405046] [2021-05-02 20:43:41,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:43:41,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:41,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:43:41,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:43:41,609 INFO L87 Difference]: Start difference. First operand 271 states and 377 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:43:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:41,661 INFO L93 Difference]: Finished difference Result 368 states and 520 transitions. [2021-05-02 20:43:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:43:41,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2021-05-02 20:43:41,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:41,664 INFO L225 Difference]: With dead ends: 368 [2021-05-02 20:43:41,664 INFO L226 Difference]: Without dead ends: 360 [2021-05-02 20:43:41,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:43:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-02 20:43:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 325. [2021-05-02 20:43:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 239 states have (on average 1.3263598326359833) internal successors, (317), 253 states have internal predecessors, (317), 70 states have call successors, (70), 16 states have call predecessors, (70), 15 states have return successors, (68), 55 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 20:43:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 455 transitions. [2021-05-02 20:43:41,682 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 455 transitions. Word has length 55 [2021-05-02 20:43:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:41,682 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 455 transitions. [2021-05-02 20:43:41,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:43:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 455 transitions. [2021-05-02 20:43:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:43:41,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:41,683 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:41,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:43:41,901 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash 254685725, now seen corresponding path program 3 times [2021-05-02 20:43:41,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:41,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606564815] [2021-05-02 20:43:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:41,907 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:41,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967829037] [2021-05-02 20:43:41,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:42,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:43:42,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:43:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:43:42,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:42,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:42,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:43:42,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:42,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606564815] [2021-05-02 20:43:42,158 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:42,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967829037] [2021-05-02 20:43:42,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967829037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:42,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:42,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:43:42,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585012642] [2021-05-02 20:43:42,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:43:42,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:43:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:43:42,160 INFO L87 Difference]: Start difference. First operand 325 states and 455 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:43:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:46,306 INFO L93 Difference]: Finished difference Result 336 states and 469 transitions. [2021-05-02 20:43:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:43:46,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-05-02 20:43:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:46,308 INFO L225 Difference]: With dead ends: 336 [2021-05-02 20:43:46,308 INFO L226 Difference]: Without dead ends: 336 [2021-05-02 20:43:46,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:43:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-02 20:43:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2021-05-02 20:43:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 246 states have (on average 1.3252032520325203) internal successors, (326), 262 states have internal predecessors, (326), 72 states have call successors, (72), 17 states have call predecessors, (72), 16 states have return successors, (70), 55 states have call predecessors, (70), 70 states have call successors, (70) [2021-05-02 20:43:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 468 transitions. [2021-05-02 20:43:46,319 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 468 transitions. Word has length 55 [2021-05-02 20:43:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:46,319 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 468 transitions. [2021-05-02 20:43:46,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:43:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 468 transitions. [2021-05-02 20:43:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 20:43:46,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:46,320 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:46,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:43:46,523 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:46,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1625914620, now seen corresponding path program 2 times [2021-05-02 20:43:46,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:46,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626389081] [2021-05-02 20:43:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:46,531 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:46,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95532142] [2021-05-02 20:43:46,531 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:46,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:43:46,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:43:46,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:43:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:46,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:43:46,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:46,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626389081] [2021-05-02 20:43:46,754 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:46,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95532142] [2021-05-02 20:43:46,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95532142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:46,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:46,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:43:46,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555834943] [2021-05-02 20:43:46,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:43:46,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:46,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:43:46,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:43:46,755 INFO L87 Difference]: Start difference. First operand 335 states and 468 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 20:43:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:46,862 INFO L93 Difference]: Finished difference Result 314 states and 432 transitions. [2021-05-02 20:43:46,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:43:46,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2021-05-02 20:43:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:46,867 INFO L225 Difference]: With dead ends: 314 [2021-05-02 20:43:46,867 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 20:43:46,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:43:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 20:43:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2021-05-02 20:43:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 231 states have (on average 1.3116883116883118) internal successors, (303), 243 states have internal predecessors, (303), 65 states have call successors, (65), 17 states have call predecessors, (65), 16 states have return successors, (63), 52 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 20:43:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 431 transitions. [2021-05-02 20:43:46,875 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 431 transitions. Word has length 57 [2021-05-02 20:43:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:46,876 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 431 transitions. [2021-05-02 20:43:46,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 20:43:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 431 transitions. [2021-05-02 20:43:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 20:43:46,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:46,876 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:47,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:43:47,093 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1635475232, now seen corresponding path program 3 times [2021-05-02 20:43:47,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:47,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121173608] [2021-05-02 20:43:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:47,097 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:47,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394006565] [2021-05-02 20:43:47,097 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:47,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 20:43:47,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:43:47,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:43:47,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:47,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:43:47,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:47,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121173608] [2021-05-02 20:43:47,431 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:47,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394006565] [2021-05-02 20:43:47,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394006565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:47,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:47,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:43:47,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769456814] [2021-05-02 20:43:47,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:43:47,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:47,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:43:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:43:47,433 INFO L87 Difference]: Start difference. First operand 313 states and 431 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 20:43:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:47,566 INFO L93 Difference]: Finished difference Result 315 states and 433 transitions. [2021-05-02 20:43:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:43:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-02 20:43:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:47,568 INFO L225 Difference]: With dead ends: 315 [2021-05-02 20:43:47,568 INFO L226 Difference]: Without dead ends: 315 [2021-05-02 20:43:47,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:43:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-02 20:43:47,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-05-02 20:43:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 233 states have (on average 1.3090128755364807) internal successors, (305), 245 states have internal predecessors, (305), 65 states have call successors, (65), 17 states have call predecessors, (65), 16 states have return successors, (63), 52 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 20:43:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 433 transitions. [2021-05-02 20:43:47,576 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 433 transitions. Word has length 59 [2021-05-02 20:43:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:47,577 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 433 transitions. [2021-05-02 20:43:47,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 20:43:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 433 transitions. [2021-05-02 20:43:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 20:43:47,577 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:47,578 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:47,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:47,784 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1972951801, now seen corresponding path program 2 times [2021-05-02 20:43:47,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:47,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999583346] [2021-05-02 20:43:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:47,791 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:47,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371793492] [2021-05-02 20:43:47,792 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:47,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:43:47,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 20:43:47,848 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:43:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:43:47,871 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:43:47,947 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:43:47,947 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:43:48,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:48,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:43:48 BasicIcfg [2021-05-02 20:43:48,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:43:48,210 INFO L168 Benchmark]: Toolchain (without parser) took 563163.78 ms. Allocated memory was 127.9 MB in the beginning and 229.6 MB in the end (delta: 101.7 MB). Free memory was 93.0 MB in the beginning and 197.0 MB in the end (delta: -103.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:43:48,210 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 127.9 MB. Free memory is still 109.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:43:48,210 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.00 ms. Allocated memory was 127.9 MB in the beginning and 190.8 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 172.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:43:48,211 INFO L168 Benchmark]: Boogie Preprocessor took 73.03 ms. Allocated memory is still 190.8 MB. Free memory was 172.7 MB in the beginning and 173.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:43:48,211 INFO L168 Benchmark]: RCFGBuilder took 390.39 ms. Allocated memory is still 190.8 MB. Free memory was 173.9 MB in the beginning and 157.4 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:43:48,211 INFO L168 Benchmark]: IcfgTransformer took 47.15 ms. Allocated memory is still 190.8 MB. Free memory was 157.4 MB in the beginning and 156.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:43:48,211 INFO L168 Benchmark]: TraceAbstraction took 562430.91 ms. Allocated memory was 190.8 MB in the beginning and 229.6 MB in the end (delta: 38.8 MB). Free memory was 155.6 MB in the beginning and 197.0 MB in the end (delta: -41.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:43:48,211 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 127.9 MB. Free memory is still 109.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 214.00 ms. Allocated memory was 127.9 MB in the beginning and 190.8 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 172.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 73.03 ms. Allocated memory is still 190.8 MB. Free memory was 172.7 MB in the beginning and 173.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 390.39 ms. Allocated memory is still 190.8 MB. Free memory was 173.9 MB in the beginning and 157.4 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 47.15 ms. Allocated memory is still 190.8 MB. Free memory was 157.4 MB in the beginning and 156.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 562430.91 ms. Allocated memory was 190.8 MB in the beginning and 229.6 MB in the end (delta: 38.8 MB). Free memory was 155.6 MB in the beginning and 197.0 MB in the end (delta: -41.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=8, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=5, counter=0, R=1] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=5, counter=0, R=1] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=5, counter=0, r=-4, R=1, u=3, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=5, counter=1, counter++=0, R=1, r=-4, u=3, v=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=1, r=-4, R=1, u=3, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=5, counter=1, r=-4, R=1, u=3, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=5, counter=2, counter++=1, r=-4, R=1, u=3, v=1] [L39] COND TRUE counter++<5 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=2, r=-4, R=1, u=3, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=5, counter=2, R=1, r=-4, u=3, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=5, counter=3, counter++=2, r=-4, R=1, u=3, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=3, R=1, r=-4, u=3, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=5, counter=3, r=-1, R=1, u=5, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=5, counter=4, counter++=3, r=-1, R=1, u=5, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=4, r=-1, R=1, u=5, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=5, counter=4, R=1, r=4, u=7, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=5, counter=5, counter++=4, R=1, r=4, u=7, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=5, R=1, r=4, u=7, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=5, counter=5, R=1, r=4, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=5, counter=6, counter++=5, R=1, r=4, u=7, v=1] [L34] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 562323.6ms, OverallIterations: 20, TraceHistogramMax: 6, EmptinessCheckTime: 30.2ms, AutomataDifference: 470119.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 824 SDtfs, 592 SDslu, 2833 SDs, 0 SdLazy, 1790 SolverSat, 268 SolverUnsat, 140 SolverUnknown, 0 SolverNotchecked, 396135.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 853 GetRequests, 704 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 154934.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=335occurred in iteration=17, InterpolantAutomatonStates: 158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 200.4ms AutomataMinimizationTime, 19 MinimizatonAttempts, 159 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 178.1ms SsaConstructionTime, 827.0ms SatisfiabilityAnalysisTime, 85682.3ms InterpolantComputationTime, 895 NumberOfCodeBlocks, 879 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 813 ConstructedInterpolants, 35 QuantifiedInterpolants, 5273 SizeOfPredicates, 62 NumberOfNonLiveVariables, 3215 ConjunctsInSsa, 290 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 284/500 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 RESULT: Ultimate proved your program to be incorrect! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...