/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-6253b08 [2021-05-06 08:07:24,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:07:24,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:07:24,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:07:24,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:07:24,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:07:24,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:07:24,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:07:24,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:07:24,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:07:24,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:07:24,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:07:24,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:07:24,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:07:24,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:07:24,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:07:24,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:07:24,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:07:24,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:07:24,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:07:24,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:07:24,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:07:24,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:07:24,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:07:24,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:07:24,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:07:24,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:07:24,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:07:24,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:07:24,192 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:07:24,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:07:24,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:07:24,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:07:24,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:07:24,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:07:24,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:07:24,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:07:24,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:07:24,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:07:24,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:07:24,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:07:24,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:07:24,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:07:24,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:07:24,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:07:24,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:07:24,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:07:24,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:07:24,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:07:24,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:07:24,198 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:07:24,198 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:07:24,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:07:24,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:07:24,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:07:24,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:07:24,485 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:07:24,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound1.c [2021-05-06 08:07:24,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89c9161e0/16f128ed04b144b7a3a543f9f2b9153b/FLAG150f94093 [2021-05-06 08:07:24,918 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:07:24,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound1.c [2021-05-06 08:07:24,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89c9161e0/16f128ed04b144b7a3a543f9f2b9153b/FLAG150f94093 [2021-05-06 08:07:25,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89c9161e0/16f128ed04b144b7a3a543f9f2b9153b [2021-05-06 08:07:25,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:07:25,339 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:07:25,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:07:25,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:07:25,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:07:25,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ce7f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25, skipping insertion in model container [2021-05-06 08:07:25,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:07:25,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:07:25,452 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] [2021-05-06 08:07:25,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:07:25,485 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:07:25,525 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] [2021-05-06 08:07:25,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:07:25,559 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:07:25,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25 WrapperNode [2021-05-06 08:07:25,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:07:25,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:07:25,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:07:25,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:07:25,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:07:25,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:07:25,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:07:25,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:07:25,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:07:25,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:07:25,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:07:25,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:07:25,641 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:07:25,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:07:25,642 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:07:25,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:07:25,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:07:25,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:07:25,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:07:25,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:07:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:07:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:07:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:07:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:07:25,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:07:25,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:07:25,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:07:25,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:07:25,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:07:25,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:07:25,882 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:07:25,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:07:25 BoogieIcfgContainer [2021-05-06 08:07:25,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:07:25,884 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:07:25,884 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:07:25,884 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:07:25,886 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:07:25" (1/1) ... [2021-05-06 08:07:25,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:07:25 BasicIcfg [2021-05-06 08:07:25,912 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:07:25,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:07:25,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:07:25,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:07:25,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:07:25" (1/4) ... [2021-05-06 08:07:25,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289e7291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:07:25, skipping insertion in model container [2021-05-06 08:07:25,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:25" (2/4) ... [2021-05-06 08:07:25,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289e7291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:07:25, skipping insertion in model container [2021-05-06 08:07:25,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:07:25" (3/4) ... [2021-05-06 08:07:25,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289e7291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:07:25, skipping insertion in model container [2021-05-06 08:07:25,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:07:25" (4/4) ... [2021-05-06 08:07:25,925 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound1.cJordan [2021-05-06 08:07:25,929 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:07:25,940 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:07:25,952 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:07:25,964 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:07:25,965 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:07:25,965 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:07:25,965 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:07:25,965 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:07:25,965 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:07:25,965 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:07:25,965 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:07:25,974 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) [2021-05-06 08:07:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:07:25,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:25,979 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:07:25,979 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:25,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-06 08:07:25,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:25,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502673934] [2021-05-06 08:07:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:26,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:07:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:26,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:07:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:26,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:07:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:07:26,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:26,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502673934] [2021-05-06 08:07:26,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502673934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:26,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:26,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:07:26,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499861699] [2021-05-06 08:07:26,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:07:26,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:26,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:07:26,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:07:26,238 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) [2021-05-06 08:07:26,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:26,389 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-06 08:07:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:07:26,391 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 [2021-05-06 08:07:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:26,395 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:07:26,396 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 08:07:26,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:07:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 08:07:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 08:07:26,434 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) [2021-05-06 08:07:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 08:07:26,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 08:07:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:26,436 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 08:07:26,436 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) [2021-05-06 08:07:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 08:07:26,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:07:26,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:26,437 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] [2021-05-06 08:07:26,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:07:26,438 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:26,438 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-06 08:07:26,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:26,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967006670] [2021-05-06 08:07:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:26,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:07:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:26,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:07:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:26,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:07:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:07:26,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:26,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967006670] [2021-05-06 08:07:26,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967006670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:26,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:26,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355107653] [2021-05-06 08:07:26,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:26,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:26,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:26,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:26,561 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) [2021-05-06 08:07:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:26,710 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-06 08:07:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:07:26,711 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 [2021-05-06 08:07:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:26,712 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:07:26,712 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:07:26,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:07:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:07:26,723 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) [2021-05-06 08:07:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:07:26,726 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 08:07:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:26,727 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:07:26,728 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) [2021-05-06 08:07:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:07:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:07:26,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:26,731 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] [2021-05-06 08:07:26,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:07:26,736 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-06 08:07:26,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:26,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461073474] [2021-05-06 08:07:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:26,746 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:26,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507794745] [2021-05-06 08:07:26,747 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 [2021-05-06 08:07:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:26,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:07:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:26,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:07:26,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461073474] [2021-05-06 08:07:26,952 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:26,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507794745] [2021-05-06 08:07:26,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507794745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:26,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:26,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:26,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249496399] [2021-05-06 08:07:26,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:26,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:26,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:26,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:26,955 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:07:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:26,997 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-06 08:07:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:07:26,997 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), 2 states have call successors, (5), 2 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 23 [2021-05-06 08:07:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:26,999 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:07:26,999 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:07:26,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:07:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 08:07:27,009 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) [2021-05-06 08:07:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 08:07:27,011 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 08:07:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:27,012 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 08:07:27,012 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:07:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 08:07:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:07:27,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:27,014 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] [2021-05-06 08:07:27,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:07:27,229 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-06 08:07:27,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:27,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435188774] [2021-05-06 08:07:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:27,237 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:27,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195939884] [2021-05-06 08:07:27,238 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 [2021-05-06 08:07:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:27,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:07:27,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:27,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:27,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:27,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:27,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:27,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:07:27,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435188774] [2021-05-06 08:07:27,415 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195939884] [2021-05-06 08:07:27,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195939884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:27,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:27,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:07:27,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940561875] [2021-05-06 08:07:27,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:07:27,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:07:27,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:07:27,417 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:07:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:27,515 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-06 08:07:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:07:27,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:07:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:27,519 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:07:27,519 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:07:27,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:07:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:07:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 08:07:27,529 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) [2021-05-06 08:07:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 08:07:27,530 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 08:07:27,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:27,531 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 08:07:27,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:07:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 08:07:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:07:27,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:27,532 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] [2021-05-06 08:07:27,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:27,745 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:27,745 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-06 08:07:27,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:27,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887315185] [2021-05-06 08:07:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:27,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:27,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778332757] [2021-05-06 08:07:27,754 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 [2021-05-06 08:07:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:27,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:07:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:27,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 08:07:27,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:27,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887315185] [2021-05-06 08:07:27,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:27,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778332757] [2021-05-06 08:07:27,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778332757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:27,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:27,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:27,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96402832] [2021-05-06 08:07:27,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:27,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:27,873 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:07:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:27,908 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-06 08:07:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:07:27,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:07:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:27,909 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:07:27,909 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:07:27,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:07:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:07:27,913 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) [2021-05-06 08:07:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 08:07:27,913 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 08:07:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:27,913 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 08:07:27,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:07:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 08:07:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:07:27,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:27,914 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] [2021-05-06 08:07:28,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:28,129 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-06 08:07:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:28,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159524755] [2021-05-06 08:07:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:28,138 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:28,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723258292] [2021-05-06 08:07:28,138 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 [2021-05-06 08:07:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:28,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:07:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:28,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:07:28,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:28,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159524755] [2021-05-06 08:07:28,249 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:28,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723258292] [2021-05-06 08:07:28,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723258292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:28,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:28,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:28,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039255903] [2021-05-06 08:07:28,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:28,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:28,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:28,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:28,250 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) [2021-05-06 08:07:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:28,282 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-06 08:07:28,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:07:28,282 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 [2021-05-06 08:07:28,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:28,283 INFO L225 Difference]: With dead ends: 75 [2021-05-06 08:07:28,283 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 08:07:28,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 08:07:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 08:07:28,287 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) [2021-05-06 08:07:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 08:07:28,288 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 08:07:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:28,288 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 08:07:28,288 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) [2021-05-06 08:07:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 08:07:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:07:28,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:28,289 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] [2021-05-06 08:07:28,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:28,505 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-06 08:07:28,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:28,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54452591] [2021-05-06 08:07:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:28,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:28,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760778554] [2021-05-06 08:07:28,512 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 [2021-05-06 08:07:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:07:28,567 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:07:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:07:28,583 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:07:28,626 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:07:28,626 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:07:28,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 08:07:28,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:07:28 BasicIcfg [2021-05-06 08:07:28,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:07:28,912 INFO L168 Benchmark]: Toolchain (without parser) took 3573.01 ms. Allocated memory was 191.9 MB in the beginning and 266.3 MB in the end (delta: 74.4 MB). Free memory was 156.5 MB in the beginning and 118.3 MB in the end (delta: 38.3 MB). Peak memory consumption was 113.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:07:28,912 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 191.9 MB. Free memory is still 173.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:07:28,912 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.57 ms. Allocated memory is still 191.9 MB. Free memory was 156.3 MB in the beginning and 174.8 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:07:28,912 INFO L168 Benchmark]: Boogie Preprocessor took 19.62 ms. Allocated memory is still 191.9 MB. Free memory was 174.8 MB in the beginning and 173.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:07:28,912 INFO L168 Benchmark]: RCFGBuilder took 302.69 ms. Allocated memory is still 191.9 MB. Free memory was 173.0 MB in the beginning and 157.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:07:28,912 INFO L168 Benchmark]: IcfgTransformer took 27.98 ms. Allocated memory is still 191.9 MB. Free memory was 157.3 MB in the beginning and 156.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:07:28,912 INFO L168 Benchmark]: TraceAbstraction took 2998.33 ms. Allocated memory was 191.9 MB in the beginning and 266.3 MB in the end (delta: 74.4 MB). Free memory was 155.6 MB in the beginning and 118.3 MB in the end (delta: 37.3 MB). Peak memory consumption was 112.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:07:28,912 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 191.9 MB. Free memory is still 173.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 217.57 ms. Allocated memory is still 191.9 MB. Free memory was 156.3 MB in the beginning and 174.8 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.62 ms. Allocated memory is still 191.9 MB. Free memory was 174.8 MB in the beginning and 173.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 302.69 ms. Allocated memory is still 191.9 MB. Free memory was 173.0 MB in the beginning and 157.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 27.98 ms. Allocated memory is still 191.9 MB. Free memory was 157.3 MB in the beginning and 156.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2998.33 ms. Allocated memory was 191.9 MB in the beginning and 266.3 MB in the end (delta: 74.4 MB). Free memory was 155.6 MB in the beginning and 118.3 MB in the end (delta: 37.3 MB). Peak memory consumption was 112.7 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: 2898.9ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 12.8ms, AutomataDifference: 546.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 239 SDtfs, 69 SDslu, 525 SDs, 0 SdLazy, 244 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 305.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 155.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=6, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.9ms AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 71.9ms SsaConstructionTime, 155.1ms SatisfiabilityAnalysisTime, 609.0ms InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 162 ConstructedInterpolants, 0 QuantifiedInterpolants, 394 SizeOfPredicates, 5 NumberOfNonLiveVariables, 588 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 52/52 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...