/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/egcd-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:16:35,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:16:35,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:16:35,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:16:35,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:16:35,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:16:35,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:16:35,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:16:35,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:16:35,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:16:35,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:16:35,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:16:35,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:16:35,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:16:35,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:16:35,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:16:35,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:16:35,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:16:35,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:16:35,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:16:35,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:16:35,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:16:35,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:16:35,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:16:35,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:16:35,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:16:35,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:16:35,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:16:35,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:16:35,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:16:35,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:16:35,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:16:35,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:16:35,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:16:35,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:16:35,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:16:35,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:16:35,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:16:35,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:16:35,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:16:35,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:16:35,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:16:35,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:16:35,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:16:35,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:16:35,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:16:35,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:16:35,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:16:35,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:16:35,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:16:35,996 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:16:35,996 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:16:36,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:16:36,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:16:36,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:16:36,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:16:36,251 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:16:36,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound1.c [2021-05-02 20:16:36,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f01d61cc/019ba67d74b44617a01b52509994b96c/FLAG7c38db2d5 [2021-05-02 20:16:36,735 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:16:36,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound1.c [2021-05-02 20:16:36,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f01d61cc/019ba67d74b44617a01b52509994b96c/FLAG7c38db2d5 [2021-05-02 20:16:36,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f01d61cc/019ba67d74b44617a01b52509994b96c [2021-05-02 20:16:36,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:16:36,757 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:16:36,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:16:36,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:16:36,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:16:36,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:16:36" (1/1) ... [2021-05-02 20:16:36,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33aa945f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36, skipping insertion in model container [2021-05-02 20:16:36,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:16:36" (1/1) ... [2021-05-02 20:16:36,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:16:36,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:16:36,891 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/egcd-ll_unwindbound1.c[489,502] [2021-05-02 20:16:36,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:16:36,919 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:16:36,930 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/egcd-ll_unwindbound1.c[489,502] [2021-05-02 20:16:36,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:16:36,999 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:16:36,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36 WrapperNode [2021-05-02 20:16:36,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:16:37,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:16:37,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:16:37,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:16:37,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36" (1/1) ... [2021-05-02 20:16:37,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36" (1/1) ... [2021-05-02 20:16:37,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36" (1/1) ... [2021-05-02 20:16:37,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36" (1/1) ... [2021-05-02 20:16:37,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36" (1/1) ... [2021-05-02 20:16:37,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36" (1/1) ... [2021-05-02 20:16:37,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36" (1/1) ... [2021-05-02 20:16:37,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:16:37,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:16:37,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:16:37,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:16:37,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36" (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 20:16:37,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:16:37,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:16:37,104 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:16:37,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:16:37,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:16:37,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:16:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:16:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:16:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:16:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:16:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:16:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:16:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:16:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:16:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:16:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:16:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:16:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:16:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:16:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:16:37,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:16:37,343 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:16:37,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:16:37 BoogieIcfgContainer [2021-05-02 20:16:37,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:16:37,344 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:16:37,344 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:16:37,345 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:16:37,346 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:16:37" (1/1) ... [2021-05-02 20:16:37,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:16:37 BasicIcfg [2021-05-02 20:16:37,357 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:16:37,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:16:37,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:16:37,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:16:37,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:16:36" (1/4) ... [2021-05-02 20:16:37,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3424cb6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:16:37, skipping insertion in model container [2021-05-02 20:16:37,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:36" (2/4) ... [2021-05-02 20:16:37,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3424cb6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:16:37, skipping insertion in model container [2021-05-02 20:16:37,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:16:37" (3/4) ... [2021-05-02 20:16:37,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3424cb6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:16:37, skipping insertion in model container [2021-05-02 20:16:37,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:16:37" (4/4) ... [2021-05-02 20:16:37,362 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound1.cJordan [2021-05-02 20:16:37,366 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:16:37,368 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:16:37,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:16:37,391 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:16:37,392 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:16:37,392 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:16:37,392 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:16:37,392 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:16:37,392 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:16:37,392 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:16:37,392 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:16:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:16:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:16:37,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:37,406 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:16:37,406 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-02 20:16:37,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:37,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342407915] [2021-05-02 20:16:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:37,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:16:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:37,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:16:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:37,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:16:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:16:37,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:37,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342407915] [2021-05-02 20:16:37,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342407915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:37,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:37,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:16:37,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930562297] [2021-05-02 20:16:37,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:16:37,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:16:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:16:37,611 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:16:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:37,687 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-02 20:16:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:16:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 20:16:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:37,693 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:16:37,693 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 20:16:37,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:16:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 20:16:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 20:16:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:16:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 20:16:37,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-02 20:16:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:37,728 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 20:16:37,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:16:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 20:16:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:16:37,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:37,729 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:16:37,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:16:37,730 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:37,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-02 20:16:37,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:37,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444715142] [2021-05-02 20:16:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:37,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:16:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:37,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:16:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:37,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:16:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:16:37,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:37,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444715142] [2021-05-02 20:16:37,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444715142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:37,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:37,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:16:37,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148375726] [2021-05-02 20:16:37,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:16:37,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:37,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:16:37,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:16:37,970 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:16:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:38,197 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-02 20:16:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:16:38,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:16:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:38,198 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:16:38,198 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:16:38,199 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:16:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:16:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:16:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:16:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 20:16:38,203 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-02 20:16:38,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:38,203 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 20:16:38,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:16:38,203 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 20:16:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:16:38,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:38,204 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:16:38,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:16:38,204 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-02 20:16:38,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:38,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181390003] [2021-05-02 20:16:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:38,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:38,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928494484] [2021-05-02 20:16:38,213 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 20:16:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:38,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:16:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:38,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:16:38,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:38,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181390003] [2021-05-02 20:16:38,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:38,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928494484] [2021-05-02 20:16:38,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928494484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:38,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:38,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:16:38,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346027796] [2021-05-02 20:16:38,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:16:38,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:16:38,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:16:38,377 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:16:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:38,435 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-02 20:16:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:16:38,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-02 20:16:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:38,436 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:16:38,436 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:16:38,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:16:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 20:16:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:16:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-02 20:16:38,442 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-02 20:16:38,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:38,442 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-02 20:16:38,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:16:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-02 20:16:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:16:38,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:38,443 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:16:38,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:16:38,662 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:38,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-02 20:16:38,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:38,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609312501] [2021-05-02 20:16:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:38,669 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:38,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832936650] [2021-05-02 20:16:38,669 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 20:16:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:16:38,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:38,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:16:38,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:38,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609312501] [2021-05-02 20:16:38,836 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:38,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832936650] [2021-05-02 20:16:38,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832936650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:38,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:38,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:16:38,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732070918] [2021-05-02 20:16:38,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:16:38,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:38,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:16:38,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:38,838 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:16:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:38,962 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-02 20:16:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:16:38,962 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 20:16:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:38,965 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:16:38,966 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:16:38,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:16:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-02 20:16:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:16:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-02 20:16:38,985 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-02 20:16:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:38,985 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-02 20:16:38,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:16:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-02 20:16:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:16:38,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:38,986 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:16:39,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:39,197 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:39,198 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-02 20:16:39,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:39,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501887985] [2021-05-02 20:16:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:39,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:39,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002961406] [2021-05-02 20:16:39,205 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 20:16:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:16:39,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:39,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:16:39,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501887985] [2021-05-02 20:16:39,414 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002961406] [2021-05-02 20:16:39,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002961406] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:39,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:39,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:16:39,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483576217] [2021-05-02 20:16:39,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:16:39,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:39,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:16:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:39,416 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:16:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:39,504 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-02 20:16:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:16:39,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-02 20:16:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:39,506 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:16:39,506 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:16:39,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:16:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 20:16:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:16:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-02 20:16:39,510 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-02 20:16:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:39,510 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-02 20:16:39,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:16:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-02 20:16:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:16:39,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:39,511 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:16:39,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:39,717 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:39,717 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-02 20:16:39,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:39,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45209328] [2021-05-02 20:16:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:39,741 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:39,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934557066] [2021-05-02 20:16:39,741 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 20:16:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:39,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:16:39,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:16:39,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:39,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45209328] [2021-05-02 20:16:39,866 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:39,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934557066] [2021-05-02 20:16:39,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934557066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:39,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:39,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:16:39,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039407954] [2021-05-02 20:16:39,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:16:39,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:39,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:16:39,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:16:39,883 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:16:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:39,907 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-02 20:16:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:16:39,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-02 20:16:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:39,908 INFO L225 Difference]: With dead ends: 75 [2021-05-02 20:16:39,909 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 20:16:39,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:16:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 20:16:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-02 20:16:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:16:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-02 20:16:39,913 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-02 20:16:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:39,913 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-02 20:16:39,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 20:16:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-02 20:16:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:16:39,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:39,914 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:16:40,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:40,115 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-02 20:16:40,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:40,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766630545] [2021-05-02 20:16:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:40,121 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:40,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589392236] [2021-05-02 20:16:40,121 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 20:16:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:16:40,222 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:16:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:16:40,269 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:16:40,334 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:16:40,334 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:16:40,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 20:16:40,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:16:40 BasicIcfg [2021-05-02 20:16:40,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:16:40,575 INFO L168 Benchmark]: Toolchain (without parser) took 3818.29 ms. Allocated memory was 165.7 MB in the beginning and 199.2 MB in the end (delta: 33.6 MB). Free memory was 130.3 MB in the beginning and 152.5 MB in the end (delta: -22.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:16:40,575 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 165.7 MB. Free memory was 146.8 MB in the beginning and 146.7 MB in the end (delta: 103.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:16:40,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.73 ms. Allocated memory is still 165.7 MB. Free memory was 130.1 MB in the beginning and 149.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:16:40,575 INFO L168 Benchmark]: Boogie Preprocessor took 37.95 ms. Allocated memory is still 165.7 MB. Free memory was 149.1 MB in the beginning and 147.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:16:40,575 INFO L168 Benchmark]: RCFGBuilder took 304.71 ms. Allocated memory is still 165.7 MB. Free memory was 147.5 MB in the beginning and 131.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:16:40,575 INFO L168 Benchmark]: IcfgTransformer took 13.43 ms. Allocated memory is still 165.7 MB. Free memory was 131.2 MB in the beginning and 129.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:16:40,575 INFO L168 Benchmark]: TraceAbstraction took 3215.94 ms. Allocated memory was 165.7 MB in the beginning and 199.2 MB in the end (delta: 33.6 MB). Free memory was 129.1 MB in the beginning and 152.5 MB in the end (delta: -23.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:16:40,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 165.7 MB. Free memory was 146.8 MB in the beginning and 146.7 MB in the end (delta: 103.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.73 ms. Allocated memory is still 165.7 MB. Free memory was 130.1 MB in the beginning and 149.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.95 ms. Allocated memory is still 165.7 MB. Free memory was 149.1 MB in the beginning and 147.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 304.71 ms. Allocated memory is still 165.7 MB. Free memory was 147.5 MB in the beginning and 131.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.43 ms. Allocated memory is still 165.7 MB. Free memory was 131.2 MB in the beginning and 129.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3215.94 ms. Allocated memory was 165.7 MB in the beginning and 199.2 MB in the end (delta: 33.6 MB). Free memory was 129.1 MB in the beginning and 152.5 MB in the end (delta: -23.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=13, counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=3, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=3, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=3, b=1, counter=0, p=1, q=0, r=0, s=1, x=3, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=3, y=1] [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=0, s=1, x=3, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=0, s=1, x=3, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=0, s=1, x=3, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=0, s=1, x=3, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=2, b=1, counter=1, p=1, q=0, r=-1, s=1, x=3, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=3, y=1] [L34] COND FALSE !(counter++<1) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3160.2ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 11.1ms, AutomataDifference: 642.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 229 SDtfs, 114 SDslu, 617 SDs, 0 SdLazy, 320 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 377.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 289.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=6, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 54.6ms SsaConstructionTime, 156.0ms SatisfiabilityAnalysisTime, 730.3ms InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 162 ConstructedInterpolants, 0 QuantifiedInterpolants, 482 SizeOfPredicates, 10 NumberOfNonLiveVariables, 588 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 49/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...