/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/loops-crafted-1/sumt2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:54:15,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:54:15,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:54:15,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:54:15,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:54:15,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:54:15,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:54:15,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:54:15,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:54:15,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:54:15,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:54:15,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:54:15,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:54:15,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:54:15,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:54:15,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:54:15,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:54:15,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:54:15,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:54:15,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:54:15,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:54:15,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:54:15,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:54:15,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:54:15,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:54:15,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:54:15,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:54:15,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:54:15,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:54:15,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:54:15,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:54:15,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:54:15,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:54:15,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:54:15,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:54:15,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:54:15,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:54:15,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:54:15,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:54:15,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:54:15,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:54:15,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:54:15,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:54:15,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:54:15,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:54:15,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:54:15,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:54:15,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:54:15,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:54:15,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:54:15,997 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:54:15,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:54:16,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:54:16,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:54:16,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:54:16,526 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:54:16,527 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:54:16,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt2.c [2021-05-02 18:54:16,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765357a68/9b6a9453e9f44ff88dad32d8ea6a43d2/FLAGcc03b05df [2021-05-02 18:54:17,016 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:54:17,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt2.c [2021-05-02 18:54:17,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765357a68/9b6a9453e9f44ff88dad32d8ea6a43d2/FLAGcc03b05df [2021-05-02 18:54:17,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765357a68/9b6a9453e9f44ff88dad32d8ea6a43d2 [2021-05-02 18:54:17,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:54:17,465 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:54:17,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:54:17,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:54:17,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:54:17,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:54:17" (1/1) ... [2021-05-02 18:54:17,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b3550d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17, skipping insertion in model container [2021-05-02 18:54:17,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:54:17" (1/1) ... [2021-05-02 18:54:17,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:54:17,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:54:17,580 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt2.c[403,416] [2021-05-02 18:54:17,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:54:17,594 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:54:17,602 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt2.c[403,416] [2021-05-02 18:54:17,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:54:17,618 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:54:17,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17 WrapperNode [2021-05-02 18:54:17,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:54:17,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:54:17,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:54:17,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:54:17,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17" (1/1) ... [2021-05-02 18:54:17,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17" (1/1) ... [2021-05-02 18:54:17,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17" (1/1) ... [2021-05-02 18:54:17,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17" (1/1) ... [2021-05-02 18:54:17,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17" (1/1) ... [2021-05-02 18:54:17,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17" (1/1) ... [2021-05-02 18:54:17,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17" (1/1) ... [2021-05-02 18:54:17,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:54:17,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:54:17,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:54:17,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:54:17,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17" (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 18:54:17,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:54:17,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:54:17,820 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:54:17,821 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:54:17,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:54:17,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:54:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:54:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:54:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:54:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:54:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:54:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:54:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 18:54:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:54:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:54:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:54:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:54:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:54:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:54:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:54:18,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:54:18,063 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:54:18,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:54:18 BoogieIcfgContainer [2021-05-02 18:54:18,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:54:18,064 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:54:18,064 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:54:18,065 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:54:18,066 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:54:18" (1/1) ... [2021-05-02 18:54:18,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:54:18 BasicIcfg [2021-05-02 18:54:18,093 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:54:18,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:54:18,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:54:18,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:54:18,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:54:17" (1/4) ... [2021-05-02 18:54:18,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200e79e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:54:18, skipping insertion in model container [2021-05-02 18:54:18,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:17" (2/4) ... [2021-05-02 18:54:18,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200e79e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:54:18, skipping insertion in model container [2021-05-02 18:54:18,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:54:18" (3/4) ... [2021-05-02 18:54:18,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200e79e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:54:18, skipping insertion in model container [2021-05-02 18:54:18,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:54:18" (4/4) ... [2021-05-02 18:54:18,097 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt2.cJordan [2021-05-02 18:54:18,114 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:54:18,118 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:54:18,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:54:18,164 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:54:18,164 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:54:18,164 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:54:18,164 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:54:18,164 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:54:18,164 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:54:18,164 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:54:18,164 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:54:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:54:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:54:18,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:18,189 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:18,189 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:18,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1859572864, now seen corresponding path program 1 times [2021-05-02 18:54:18,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:18,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507547042] [2021-05-02 18:54:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:18,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:18,344 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 18:54:18,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:18,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507547042] [2021-05-02 18:54:18,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507547042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:54:18,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:54:18,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:54:18,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165627215] [2021-05-02 18:54:18,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:54:18,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:54:18,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:54:18,358 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 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 18:54:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:18,391 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 18:54:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:54:18,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 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 18:54:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:18,397 INFO L225 Difference]: With dead ends: 22 [2021-05-02 18:54:18,397 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 18:54:18,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:54:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 18:54:18,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 18:54:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 18:54:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 18:54:18,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-02 18:54:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:18,416 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 18:54:18,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 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 18:54:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 18:54:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:54:18,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:18,420 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:18,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:54:18,420 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1858649343, now seen corresponding path program 1 times [2021-05-02 18:54:18,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:18,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724880520] [2021-05-02 18:54:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:18,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:18,608 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 18:54:18,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:18,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724880520] [2021-05-02 18:54:18,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724880520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:54:18,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:54:18,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:54:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140602839] [2021-05-02 18:54:18,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:54:18,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:18,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:54:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:54:18,611 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 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 18:54:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:18,759 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 18:54:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:54:18,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 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 18:54:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:18,761 INFO L225 Difference]: With dead ends: 20 [2021-05-02 18:54:18,761 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 18:54:18,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:54:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 18:54:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 18:54:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 18:54:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 18:54:18,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2021-05-02 18:54:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:18,764 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 18:54:18,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 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 18:54:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 18:54:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:54:18,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:18,765 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:18,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:54:18,769 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1947773365, now seen corresponding path program 1 times [2021-05-02 18:54:18,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:18,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029324007] [2021-05-02 18:54:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:19,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:19,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:19,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029324007] [2021-05-02 18:54:19,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029324007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:19,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862536981] [2021-05-02 18:54:19,153 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 18:54:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:19,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 18:54:19,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:19,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862536981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:19,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:19,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-05-02 18:54:19,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299620843] [2021-05-02 18:54:19,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:54:19,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:19,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:54:19,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:54:19,367 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:19,701 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-05-02 18:54:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:54:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 18:54:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:19,702 INFO L225 Difference]: With dead ends: 23 [2021-05-02 18:54:19,702 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 18:54:19,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 534.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-02 18:54:19,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 18:54:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 18:54:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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 18:54:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-02 18:54:19,705 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2021-05-02 18:54:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:19,705 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-02 18:54:19,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-02 18:54:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 18:54:19,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:19,706 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:19,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:54:19,909 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:19,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1864220158, now seen corresponding path program 1 times [2021-05-02 18:54:19,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:19,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583812590] [2021-05-02 18:54:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:20,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:20,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:20,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583812590] [2021-05-02 18:54:20,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583812590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:20,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376859298] [2021-05-02 18:54:20,270 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 18:54:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:20,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 18:54:20,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:20,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:20,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:20,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:20,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376859298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:20,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:20,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2021-05-02 18:54:20,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663301976] [2021-05-02 18:54:20,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 18:54:20,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:20,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 18:54:20,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-02 18:54:20,559 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:21,026 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-05-02 18:54:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 18:54:21,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 18:54:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:21,027 INFO L225 Difference]: With dead ends: 26 [2021-05-02 18:54:21,027 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 18:54:21,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 683.1ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-05-02 18:54:21,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 18:54:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 18:54:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 18:54:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 18:54:21,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2021-05-02 18:54:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:21,030 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 18:54:21,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 18:54:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 18:54:21,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:21,030 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:21,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:21,251 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:21,252 INFO L82 PathProgramCache]: Analyzing trace with hash -404198486, now seen corresponding path program 2 times [2021-05-02 18:54:21,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:21,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344412143] [2021-05-02 18:54:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:21,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:21,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:21,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344412143] [2021-05-02 18:54:21,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344412143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:21,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806690397] [2021-05-02 18:54:21,636 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 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 18:54:21,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:54:21,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:54:21,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 18:54:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:21,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:21,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:21,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:21,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:21,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806690397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:21,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:21,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-05-02 18:54:21,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757019841] [2021-05-02 18:54:21,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 18:54:21,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:21,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 18:54:21,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-02 18:54:21,937 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 21 states have internal predecessors, (32), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:54:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:22,831 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 18:54:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 18:54:22,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 21 states have internal predecessors, (32), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-02 18:54:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:22,832 INFO L225 Difference]: With dead ends: 28 [2021-05-02 18:54:22,832 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:54:22,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1199.4ms TimeCoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 18:54:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:54:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:54:22,833 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 18:54:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:54:22,833 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-05-02 18:54:22,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:22,833 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:54:22,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 21 states have internal predecessors, (32), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:54:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:54:22,833 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:54:23,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:23,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:54:23 BasicIcfg [2021-05-02 18:54:23,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:54:23,056 INFO L168 Benchmark]: Toolchain (without parser) took 5591.05 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 144.1 MB in the beginning and 169.7 MB in the end (delta: -25.6 MB). Peak memory consumption was 52.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:54:23,057 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 178.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:54:23,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.24 ms. Allocated memory is still 178.3 MB. Free memory was 143.8 MB in the beginning and 134.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:54:23,057 INFO L168 Benchmark]: Boogie Preprocessor took 65.54 ms. Allocated memory is still 178.3 MB. Free memory was 134.4 MB in the beginning and 162.3 MB in the end (delta: -27.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 18:54:23,057 INFO L168 Benchmark]: RCFGBuilder took 378.96 ms. Allocated memory is still 178.3 MB. Free memory was 162.3 MB in the beginning and 147.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:54:23,057 INFO L168 Benchmark]: IcfgTransformer took 28.55 ms. Allocated memory is still 178.3 MB. Free memory was 147.8 MB in the beginning and 146.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:54:23,057 INFO L168 Benchmark]: TraceAbstraction took 4962.47 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 146.1 MB in the beginning and 169.7 MB in the end (delta: -23.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:54:23,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 178.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 149.24 ms. Allocated memory is still 178.3 MB. Free memory was 143.8 MB in the beginning and 134.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.54 ms. Allocated memory is still 178.3 MB. Free memory was 134.4 MB in the beginning and 162.3 MB in the end (delta: -27.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 378.96 ms. Allocated memory is still 178.3 MB. Free memory was 162.3 MB in the beginning and 147.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 28.55 ms. Allocated memory is still 178.3 MB. Free memory was 147.8 MB in the beginning and 146.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4962.47 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 146.1 MB in the beginning and 169.7 MB in the end (delta: -23.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: 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: 4890.3ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 7.9ms, AutomataDifference: 1901.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 52 SDtfs, 126 SDslu, 156 SDs, 0 SdLazy, 515 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 340.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2630.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 35.5ms SsaConstructionTime, 172.6ms SatisfiabilityAnalysisTime, 1897.1ms InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 1361 SizeOfPredicates, 4 NumberOfNonLiveVariables, 340 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/36 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! Received shutdown request...