/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:51:35,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:51:35,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:51:35,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:51:35,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:51:35,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:51:35,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:51:35,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:51:35,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:51:35,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:51:35,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:51:35,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:51:35,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:51:35,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:51:35,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:51:35,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:51:35,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:51:35,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:51:35,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:51:35,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:51:35,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:51:35,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:51:35,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:51:35,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:51:35,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:51:35,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:51:35,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:51:35,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:51:35,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:51:35,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:51:35,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:51:35,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:51:35,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:51:35,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:51:35,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:51:35,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:51:35,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:51:35,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:51:35,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:51:35,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:51:35,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:51:35,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:51:35,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:51:35,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:51:35,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:51:35,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:51:35,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:51:35,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:51:35,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:51:35,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:51:35,153 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:51:35,154 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:51:35,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:51:35,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:51:35,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:51:35,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:51:35,494 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:51:35,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c [2021-05-02 20:51:35,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b48414c2/66ea54a0d9cd40e4b2876e7ebb2f42bc/FLAGc384d82a1 [2021-05-02 20:51:36,002 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:51:36,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c [2021-05-02 20:51:36,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b48414c2/66ea54a0d9cd40e4b2876e7ebb2f42bc/FLAGc384d82a1 [2021-05-02 20:51:36,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b48414c2/66ea54a0d9cd40e4b2876e7ebb2f42bc [2021-05-02 20:51:36,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:51:36,329 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:51:36,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:36,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:51:36,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:51:36,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782da44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36, skipping insertion in model container [2021-05-02 20:51:36,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:51:36,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:51:36,463 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c[525,538] [2021-05-02 20:51:36,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:36,480 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:51:36,489 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c[525,538] [2021-05-02 20:51:36,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:36,504 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:51:36,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36 WrapperNode [2021-05-02 20:51:36,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:36,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:51:36,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:51:36,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:51:36,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:51:36,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:51:36,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:51:36,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:51:36,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:51:36,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:51:36,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:51:36,637 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:51:36,638 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:51:36,638 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:51:36,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:51:36,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:51:36,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:51:36,638 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:51:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:51:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:51:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:51:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:51:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:51:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:51:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:51:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:51:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:51:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:51:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:51:36,880 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:51:36,881 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:51:36,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:36 BoogieIcfgContainer [2021-05-02 20:51:36,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:51:36,883 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:51:36,883 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:51:36,883 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:51:36,885 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:36" (1/1) ... [2021-05-02 20:51:36,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:36 BasicIcfg [2021-05-02 20:51:36,899 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:51:36,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:51:36,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:51:36,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:51:36,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:51:36" (1/4) ... [2021-05-02 20:51:36,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388677ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:36, skipping insertion in model container [2021-05-02 20:51:36,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:36" (2/4) ... [2021-05-02 20:51:36,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388677ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:36, skipping insertion in model container [2021-05-02 20:51:36,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:36" (3/4) ... [2021-05-02 20:51:36,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388677ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:51:36, skipping insertion in model container [2021-05-02 20:51:36,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:36" (4/4) ... [2021-05-02 20:51:36,905 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound20.cJordan [2021-05-02 20:51:36,909 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:51:36,912 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:51:36,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:51:36,941 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:51:36,941 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:51:36,941 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:51:36,941 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:51:36,941 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:51:36,941 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:51:36,941 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:51:36,942 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:51:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 20:51:36,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:36,957 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:36,957 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-02 20:51:36,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:36,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300665944] [2021-05-02 20:51:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:37,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:37,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851820062] [2021-05-02 20:51:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:51:37,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:37,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300665944] [2021-05-02 20:51:37,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851820062] [2021-05-02 20:51:37,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851820062] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:37,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:37,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:51:37,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737260648] [2021-05-02 20:51:37,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:51:37,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:37,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:51:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:51:37,312 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:37,323 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 20:51:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:51:37,324 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 20:51:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:37,332 INFO L225 Difference]: With dead ends: 22 [2021-05-02 20:51:37,332 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 20:51:37,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:51:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 20:51:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 20:51:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 20:51:37,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 20:51:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:37,359 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 20:51:37,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 20:51:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:51:37,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:37,361 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:37,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:51:37,584 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:37,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-02 20:51:37,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:37,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85288141] [2021-05-02 20:51:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:37,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:37,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740743777] [2021-05-02 20:51:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:37,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:51:37,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:37,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:37,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:37,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:37,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:37,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:37,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85288141] [2021-05-02 20:51:37,775 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740743777] [2021-05-02 20:51:37,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740743777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:37,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:37,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:51:37,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443647599] [2021-05-02 20:51:37,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:51:37,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:51:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:51:37,778 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:37,788 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 20:51:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:51:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:51:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:37,789 INFO L225 Difference]: With dead ends: 19 [2021-05-02 20:51:37,789 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 20:51:37,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:51:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 20:51:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 20:51:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 20:51:37,793 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 20:51:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:37,793 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 20:51:37,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 20:51:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:51:37,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:37,794 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:38,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:38,014 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:38,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-02 20:51:38,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:38,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023003550] [2021-05-02 20:51:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:38,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:38,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033726864] [2021-05-02 20:51:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:38,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 20:51:38,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:38,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:38,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:38,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023003550] [2021-05-02 20:51:38,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:38,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033726864] [2021-05-02 20:51:38,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033726864] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:38,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:38,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:51:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50011018] [2021-05-02 20:51:38,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:51:38,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:51:38,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:51:38,180 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:38,235 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 20:51:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:51:38,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:51:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:38,236 INFO L225 Difference]: With dead ends: 26 [2021-05-02 20:51:38,236 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:51:38,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:38,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:51:38,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:51:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 20:51:38,240 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 20:51:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:38,241 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 20:51:38,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 20:51:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:51:38,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:38,242 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:38,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:38,464 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-02 20:51:38,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:38,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507794745] [2021-05-02 20:51:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:38,479 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:38,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332732773] [2021-05-02 20:51:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:51:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:38,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:38,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:38,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507794745] [2021-05-02 20:51:38,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:38,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332732773] [2021-05-02 20:51:38,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332732773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:38,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:38,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:51:38,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285790998] [2021-05-02 20:51:38,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:51:38,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:51:38,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:51:38,614 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:38,639 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-02 20:51:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:51:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:51:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:38,645 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:51:38,645 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:51:38,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:51:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:51:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 20:51:38,649 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 20:51:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:38,649 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 20:51:38,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 20:51:38,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:51:38,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:38,650 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:38,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:38,852 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:38,852 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-02 20:51:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:38,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884711649] [2021-05-02 20:51:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:38,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:38,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076875408] [2021-05-02 20:51:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:51:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:39,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:39,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:39,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884711649] [2021-05-02 20:51:39,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:39,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076875408] [2021-05-02 20:51:39,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076875408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:39,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:39,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:51:39,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933255343] [2021-05-02 20:51:39,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:51:39,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:39,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:51:39,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:39,113 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:39,187 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 20:51:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:51:39,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:51:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:39,189 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:51:39,189 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:51:39,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:51:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:51:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:51:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 20:51:39,194 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 20:51:39,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:39,194 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 20:51:39,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 20:51:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:51:39,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:39,196 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:39,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:39,405 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-02 20:51:39,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:39,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402680725] [2021-05-02 20:51:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:39,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:39,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552913730] [2021-05-02 20:51:39,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:39,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:51:39,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:39,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:51:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:39,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:39,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:39,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402680725] [2021-05-02 20:51:39,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:39,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552913730] [2021-05-02 20:51:39,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552913730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:39,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:39,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:51:39,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905726581] [2021-05-02 20:51:39,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:51:39,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:39,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:51:39,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:39,581 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:39,619 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-02 20:51:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:51:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:51:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:39,620 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:51:39,620 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:51:39,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:51:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:51:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:51:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 20:51:39,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-02 20:51:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:39,627 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 20:51:39,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 20:51:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:51:39,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:39,628 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:39,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:39,830 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:39,830 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-02 20:51:39,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:39,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325191715] [2021-05-02 20:51:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:39,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:39,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979236369] [2021-05-02 20:51:39,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:39,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:51:39,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:51:39,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:40,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:40,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:51:40,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:40,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325191715] [2021-05-02 20:51:40,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:40,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979236369] [2021-05-02 20:51:40,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979236369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:40,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:40,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:51:40,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372183219] [2021-05-02 20:51:40,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:51:40,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:40,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:51:40,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:40,166 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:52,407 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-02 20:51:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:51:52,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:51:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:52,409 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:51:52,409 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:51:52,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:51:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:51:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:51:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:51:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 20:51:52,414 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 28 [2021-05-02 20:51:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:52,414 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 20:51:52,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 20:51:52,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:51:52,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:52,415 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:52,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:52,615 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1187551519, now seen corresponding path program 1 times [2021-05-02 20:51:52,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:52,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088733828] [2021-05-02 20:51:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:52,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:52,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402437558] [2021-05-02 20:51:52,622 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 20:51:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:51:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:52,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:51:52,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:52,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088733828] [2021-05-02 20:51:52,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:52,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402437558] [2021-05-02 20:51:52,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402437558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:52,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:52,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:51:52,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579203951] [2021-05-02 20:51:52,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:51:52,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:52,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:51:52,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:51:52,794 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:51:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:54,860 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-05-02 20:51:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:51:54,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2021-05-02 20:51:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:54,862 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:51:54,862 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:51:54,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:51:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:51:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:51:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 20:51:54,868 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2021-05-02 20:51:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:54,868 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 20:51:54,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:51:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 20:51:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:51:54,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:54,869 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:55,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:51:55,073 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-02 20:51:55,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:55,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604922218] [2021-05-02 20:51:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:55,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:55,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738689971] [2021-05-02 20:51:55,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:55,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:51:55,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:55,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:51:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:57,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:59,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:01,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:01,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:01,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:01,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:01,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:01,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:16,710 WARN L205 SmtUtils]: Spent 12.36 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:52:16,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:16,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:18,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:18,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:18,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:18,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:18,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:20,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:20,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:20,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:20,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:20,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:32,633 WARN L205 SmtUtils]: Spent 8.29 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:52:32,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,797 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from false [2021-05-02 20:52:40,804 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from true [2021-05-02 20:52:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:52:40,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:40,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604922218] [2021-05-02 20:52:40,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:40,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738689971] [2021-05-02 20:52:40,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738689971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:40,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:40,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:52:40,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301659621] [2021-05-02 20:52:40,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:52:40,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:40,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:52:40,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=52, Unknown=5, NotChecked=14, Total=90 [2021-05-02 20:52:40,806 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:52:44,874 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 3 [2021-05-02 20:52:53,044 WARN L205 SmtUtils]: Spent 8.15 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 20:53:21,552 WARN L205 SmtUtils]: Spent 15.95 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 20:54:07,395 WARN L205 SmtUtils]: Spent 29.53 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-02 20:54:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:09,403 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-02 20:54:09,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:54:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:54:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:09,454 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:54:09,454 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 20:54:09,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 101129.6ms TimeCoverageRelationStatistics Valid=46, Invalid=129, Unknown=11, NotChecked=24, Total=210 [2021-05-02 20:54:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 20:54:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 20:54:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:54:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 20:54:09,458 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 20:54:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:09,458 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 20:54:09,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:54:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 20:54:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:54:09,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:09,459 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:54:09,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:54:09,662 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:09,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:09,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2081254464, now seen corresponding path program 3 times [2021-05-02 20:54:09,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:09,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3344470] [2021-05-02 20:54:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:09,671 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:09,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483056274] [2021-05-02 20:54:09,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:54:09,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:54:09,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:54:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:54:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:12,293 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:54:12,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:12,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:14,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:18,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:18,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:18,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:18,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:18,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:18,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:18,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:20,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:20,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:20,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:20,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:20,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:20,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:22,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:22,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:22,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:22,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:22,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:22,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:22,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:24,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:24,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:24,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:24,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:24,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:24,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:24,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:26,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:26,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:26,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:26,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:26,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:26,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:26,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:26,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,882 WARN L205 SmtUtils]: Spent 12.42 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 20:54:41,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:01,009 WARN L205 SmtUtils]: Spent 10.27 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 20:55:01,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:01,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:03,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:03,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:03,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:03,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:03,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:03,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:05,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:05,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:05,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:05,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:05,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:05,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:05,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:05,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:07,135 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from false [2021-05-02 20:55:09,151 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from true [2021-05-02 20:55:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:55:09,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:55:09,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3344470] [2021-05-02 20:55:09,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:55:09,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483056274] [2021-05-02 20:55:09,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483056274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:55:09,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:55:09,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:55:09,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939632228] [2021-05-02 20:55:09,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:55:09,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:55:09,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:55:09,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=51, Unknown=6, NotChecked=14, Total=90 [2021-05-02 20:55:09,154 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:55:15,505 WARN L205 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 45 DAG size of output: 6 [2021-05-02 20:56:08,186 WARN L205 SmtUtils]: Spent 30.71 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-02 20:56:32,666 WARN L205 SmtUtils]: Spent 22.22 s on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 20:56:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:36,707 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 20:56:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:56:36,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:56:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:36,738 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:56:36,738 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:56:36,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 107472.9ms TimeCoverageRelationStatistics Valid=41, Invalid=107, Unknown=12, NotChecked=22, Total=182 [2021-05-02 20:56:36,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:56:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:56:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:56:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:56:36,739 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 20:56:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:36,739 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:56:36,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:56:36,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:56:36,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:56:36,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:56:36 BasicIcfg [2021-05-02 20:56:36,944 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:56:36,944 INFO L168 Benchmark]: Toolchain (without parser) took 300615.30 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 160.8 MB in the beginning and 211.4 MB in the end (delta: -50.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:56:36,944 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 195.0 MB. Free memory was 177.7 MB in the beginning and 177.5 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:56:36,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.37 ms. Allocated memory is still 195.0 MB. Free memory was 160.6 MB in the beginning and 150.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:56:36,945 INFO L168 Benchmark]: Boogie Preprocessor took 64.35 ms. Allocated memory is still 195.0 MB. Free memory was 150.9 MB in the beginning and 178.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:56:36,945 INFO L168 Benchmark]: RCFGBuilder took 310.89 ms. Allocated memory is still 195.0 MB. Free memory was 178.4 MB in the beginning and 163.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:56:36,945 INFO L168 Benchmark]: IcfgTransformer took 16.50 ms. Allocated memory is still 195.0 MB. Free memory was 163.9 MB in the beginning and 162.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:56:36,945 INFO L168 Benchmark]: TraceAbstraction took 300043.67 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 162.2 MB in the beginning and 211.4 MB in the end (delta: -49.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:56:36,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 195.0 MB. Free memory was 177.7 MB in the beginning and 177.5 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 172.37 ms. Allocated memory is still 195.0 MB. Free memory was 160.6 MB in the beginning and 150.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.35 ms. Allocated memory is still 195.0 MB. Free memory was 150.9 MB in the beginning and 178.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 310.89 ms. Allocated memory is still 195.0 MB. Free memory was 178.4 MB in the beginning and 163.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.50 ms. Allocated memory is still 195.0 MB. Free memory was 163.9 MB in the beginning and 162.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 300043.67 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 162.2 MB in the beginning and 211.4 MB in the end (delta: -49.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 300001.8ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 13.8ms, AutomataDifference: 190807.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 174 SDtfs, 83 SDslu, 550 SDs, 0 SdLazy, 277 SolverSat, 27 SolverUnsat, 25 SolverUnknown, 0 SolverNotchecked, 50940.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 208943.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 114.8ms SsaConstructionTime, 470.0ms SatisfiabilityAnalysisTime, 105816.0ms InterpolantComputationTime, 237 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 227 ConstructedInterpolants, 6 QuantifiedInterpolants, 1739 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1366 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 115/148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...